64120532356 has 24 divisors (see below), whose sum is σ = 115242684480. Its totient is φ = 31204812000.

The previous prime is 64120532351. The next prime is 64120532393. The reversal of 64120532356 is 65323502146.

It is a super-2 number, since 2×64120532356² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64120532351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321200 + ... + 1368871.

It is an arithmetic number, because the mean of its divisors is an integer number (4801778520).

Almost surely, 2^64120532356 is an apocalyptic number.

It is an amenable number.

64120532356 is a deficient number, since it is larger than the sum of its proper divisors (51122152124).

64120532356 is a wasteful number, since it uses less digits than its factorization.

64120532356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690235 (or 2690233 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 64120532356 in words is "sixty-four billion, one hundred twenty million, five hundred thirty-two thousand, three hundred fifty-six".