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".