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64394051436 = 223311137615479
BaseRepresentation
bin111011111110001011…
…110011111101101100
320011012201202202011000
4323332023303331230
52023334334121221
645325432000300
74436513256201
oct737613637554
9204181682130
1064394051436
1125344843a30
1210591530090
1360c2bb9720
14318c29dca8
151a1d3b3e26
hexefe2f3f6c

64394051436 has 192 divisors, whose sum is σ = 196427750400. Its totient is φ = 17985369600.

The previous prime is 64394051431. The next prime is 64394051507. The reversal of 64394051436 is 63415049346.

64394051436 is a `hidden beast` number, since 6 + 43 + 94 + 0 + 514 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64394051391 and 64394051400.

It is not an unprimeable number, because it can be changed into a prime (64394051431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11750145 + ... + 11755623.

It is an arithmetic number, because the mean of its divisors is an integer number (1023061200).

Almost surely, 264394051436 is an apocalyptic number.

64394051436 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64394051436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98213875200).

64394051436 is an abundant number, since it is smaller than the sum of its proper divisors (132033698964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64394051436 is a wasteful number, since it uses less digits than its factorization.

64394051436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277 (or 6269 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 64394051436 in words is "sixty-four billion, three hundred ninety-four million, fifty-one thousand, four hundred thirty-six".