64323473220 has 192 divisors, whose sum is σ = 204632064000. Its totient is φ = 16770229632.

The previous prime is 64323473209. The next prime is 64323473233. The reversal of 64323473220 is 2237432346.

64323473220 is a `hidden beast` number, since 6 + 4 + 323 + 4 + 7 + 322 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4386661 + ... + 4401299.

It is an arithmetic number, because the mean of its divisors is an integer number (1065792000).

Almost surely, 2^64323473220 is an apocalyptic number.

64323473220 is a gapful number since it is divisible by the number (60) 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 64323473220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102316032000).

64323473220 is an abundant number, since it is smaller than the sum of its proper divisors (140308590780).

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

64323473220 is a wasteful number, since it uses less digits than its factorization.

64323473220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14839 (or 14831 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 36.

The spelling of 64323473220 in words is "sixty-four billion, three hundred twenty-three million, four hundred seventy-three thousand, two hundred twenty".