64432254657 has 16 divisors (see below), whose sum is σ = 86438322432. Its totient is φ = 42691320720.

The previous prime is 64432254563. The next prime is 64432254701. The reversal of 64432254657 is 75645223446.

It is a happy number.

It is not a de Polignac number, because 64432254657 - 2¹⁹ = 64431730369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64432254857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218782 + ... + 420392.

It is an arithmetic number, because the mean of its divisors is an integer number (5402395152).

Almost surely, 2^64432254657 is an apocalyptic number.

It is an amenable number.

64432254657 is a deficient number, since it is larger than the sum of its proper divisors (22006067775).

64432254657 is a wasteful number, since it uses less digits than its factorization.

64432254657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202268.

The product of its digits is 4838400, while the sum is 48.

The spelling of 64432254657 in words is "sixty-four billion, four hundred thirty-two million, two hundred fifty-four thousand, six hundred fifty-seven".