215257954568 has 16 divisors (see below), whose sum is σ = 406281572160. Its totient is φ = 106916202000.

The previous prime is 215257954553. The next prime is 215257954601. The reversal of 215257954568 is 865459752512.

215257954568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 89095628 + ... + 89098043.

It is an arithmetic number, because the mean of its divisors is an integer number (25392598260).

Almost surely, 2^215257954568 is an apocalyptic number.

It is an amenable number.

215257954568 is a deficient number, since it is larger than the sum of its proper divisors (191023617592).

215257954568 is a wasteful number, since it uses less digits than its factorization.

215257954568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178193828 (or 178193824 counting only the distinct ones).

The product of its digits is 30240000, while the sum is 59.

The spelling of 215257954568 in words is "two hundred fifteen billion, two hundred fifty-seven million, nine hundred fifty-four thousand, five hundred sixty-eight".