643360056156 has 48 divisors (see below), whose sum is σ = 1670525018400. Its totient is φ = 214124916096.

The previous prime is 643360056149. The next prime is 643360056197. The reversal of 643360056156 is 651650063346.

643360056156 is a `hidden beast` number, since 6 + 4 + 3 + 36 + 0 + 0 + 561 + 56 = 666.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4490761 + ... + 4631808.

It is an arithmetic number, because the mean of its divisors is an integer number (34802604550).

Almost surely, 2^643360056156 is an apocalyptic number.

It is an amenable number.

643360056156 is an abundant number, since it is smaller than the sum of its proper divisors (1027164962244).

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

643360056156 is a wasteful number, since it uses less digits than its factorization.

643360056156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9123235 (or 9123227 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 643360056156 in words is "six hundred forty-three billion, three hundred sixty million, fifty-six thousand, one hundred fifty-six".