64113031257 has 8 divisors (see below), whose sum is σ = 93255318240. Its totient is φ = 38856382560.

The previous prime is 64113031201. The next prime is 64113031259. The reversal of 64113031257 is 75213031146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64113031257 - 2¹⁵ = 64112998489 is a prime.

It is a super-2 number, since 2×64113031257² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1942819129 = 64113031257 / (6 + 4 + 1 + 1 + 3 + 0 + 3 + 1 + 2 + 5 + 7).

It is not an unprimeable number, because it can be changed into a prime (64113031259) 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, 971409532 + ... + 971409597.

It is an arithmetic number, because the mean of its divisors is an integer number (11656914780).

Almost surely, 2^64113031257 is an apocalyptic number.

It is an amenable number.

64113031257 is a deficient number, since it is larger than the sum of its proper divisors (29142286983).

64113031257 is a wasteful number, since it uses less digits than its factorization.

64113031257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942819143.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 64113031257 in words is "sixty-four billion, one hundred thirteen million, thirty-one thousand, two hundred fifty-seven".