64157031253242 has 48 divisors (see below), whose sum is σ = 139410980966400. Its totient is φ = 21323536786656.

The previous prime is 64157031253193. The next prime is 64157031253247. The reversal of 64157031253242 is 24235213075146.

64157031253242 is a `hidden beast` number, since 6 + 4 + 1 + 5 + 7 + 0 + 312 + 5 + 324 + 2 = 666.

It is a super-2 number, since 2×64157031253242² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64157031253247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28782759 + ... + 30931557.

It is an arithmetic number, because the mean of its divisors is an integer number (2904395436800).

Almost surely, 2^{64157031253242} is an apocalyptic number.

64157031253242 is an abundant number, since it is smaller than the sum of its proper divisors (75253949713158).

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

64157031253242 is a wasteful number, since it uses less digits than its factorization.

64157031253242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153627 (or 2153624 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 64157031253242 in words is "sixty-four trillion, one hundred fifty-seven billion, thirty-one million, two hundred fifty-three thousand, two hundred forty-two".