645415010656 has 48 divisors (see below), whose sum is σ = 1381689507744. Its totient is φ = 294991755264.

The previous prime is 645415010651. The next prime is 645415010657. The reversal of 645415010656 is 656010514546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645415010651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7488601 + ... + 7574296.

It is an arithmetic number, because the mean of its divisors is an integer number (28785198078).

Almost surely, 2^645415010656 is an apocalyptic number.

It is an amenable number.

645415010656 is an abundant number, since it is smaller than the sum of its proper divisors (736274497088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645415010656 is a wasteful number, since it uses less digits than its factorization.

645415010656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15063023 (or 15063015 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 645415010656 in words is "six hundred forty-five billion, four hundred fifteen million, ten thousand, six hundred fifty-six".