640259111675 has 12 divisors (see below), whose sum is σ = 795273823176. Its totient is φ = 511334692800.

The previous prime is 640259111659. The next prime is 640259111707. The reversal of 640259111675 is 576111952046.

It is not a de Polignac number, because 640259111675 - 2⁴ = 640259111659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21799946 + ... + 21829295.

It is an arithmetic number, because the mean of its divisors is an integer number (66272818598).

Almost surely, 2^640259111675 is an apocalyptic number.

640259111675 is a deficient number, since it is larger than the sum of its proper divisors (155014711501).

640259111675 is a wasteful number, since it uses less digits than its factorization.

640259111675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43629838 (or 43629833 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 640259111675 in words is "six hundred forty billion, two hundred fifty-nine million, one hundred eleven thousand, six hundred seventy-five".