646326770075375 has 8 divisors (see below), whose sum is σ = 806615809054224. Its totient is φ = 517061416060200.

The previous prime is 646326770075351. The next prime is 646326770075417. The reversal of 646326770075375 is 573570077623646.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-646326770075375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585307080177 + ... + 2585307080426.

It is an arithmetic number, because the mean of its divisors is an integer number (100826976131778).

Almost surely, 2^{646326770075375} is an apocalyptic number.

646326770075375 is a deficient number, since it is larger than the sum of its proper divisors (160289038978849).

646326770075375 is an equidigital number, since it uses as much as digits as its factorization.

646326770075375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170614160618 (or 5170614160608 counting only the distinct ones).

The product of its (nonzero) digits is 933508800, while the sum is 68.

The spelling of 646326770075375 in words is "six hundred forty-six trillion, three hundred twenty-six billion, seven hundred seventy million, seventy-five thousand, three hundred seventy-five".