640004029265 has 16 divisors (see below), whose sum is σ = 770782046400. Its totient is φ = 510154886592.

The previous prime is 640004029163. The next prime is 640004029307. The reversal of 640004029265 is 562920400046.

It is a cyclic number.

It is not a de Polignac number, because 640004029265 - 2³⁴ = 622824160081 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441391 + ... + 1832379.

It is an arithmetic number, because the mean of its divisors is an integer number (48173877900).

Almost surely, 2^640004029265 is an apocalyptic number.

It is an amenable number.

640004029265 is a deficient number, since it is larger than the sum of its proper divisors (130778017135).

640004029265 is a wasteful number, since it uses less digits than its factorization.

640004029265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392176.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 640004029265 in words is "six hundred forty billion, four million, twenty-nine thousand, two hundred sixty-five".