640451323035 has 24 divisors (see below), whose sum is σ = 1125322695744. Its totient is φ = 336894940800.

The previous prime is 640451323019. The next prime is 640451323093. The reversal of 640451323035 is 530323154046.

640451323035 is a `hidden beast` number, since 6 + 404 + 5 + 13 + 230 + 3 + 5 = 666.

It is not a de Polignac number, because 640451323035 - 2⁴ = 640451323019 is a prime.

It is a super-2 number, since 2×640451323035² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97477891 + ... + 97484460.

It is an arithmetic number, because the mean of its divisors is an integer number (46888445656).

Almost surely, 2^640451323035 is an apocalyptic number.

640451323035 is a deficient number, since it is larger than the sum of its proper divisors (484871372709).

640451323035 is a wasteful number, since it uses less digits than its factorization.

640451323035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194962435 (or 194962432 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 640451323035 in words is "six hundred forty billion, four hundred fifty-one million, three hundred twenty-three thousand, thirty-five".