215876747968 has 56 divisors (see below), whose sum is σ = 506459642400. Its totient is φ = 89328304128.

The previous prime is 215876747963. The next prime is 215876748013. The reversal of 215876747968 is 869747678512.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 215876747897 and 215876747906.

It is not an unprimeable number, because it can be changed into a prime (215876747963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8295073 + ... + 8321056.

Almost surely, 2^215876747968 is an apocalyptic number.

215876747968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

215876747968 is an abundant number, since it is smaller than the sum of its proper divisors (290582894432).

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

215876747968 is a wasteful number, since it uses less digits than its factorization.

215876747968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16616177 (or 16616167 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 70.

The spelling of 215876747968 in words is "two hundred fifteen billion, eight hundred seventy-six million, seven hundred forty-seven thousand, nine hundred sixty-eight".