215878163204 has 48 divisors (see below), whose sum is σ = 414758848896. Its totient is φ = 97501228800.

The previous prime is 215878163147. The next prime is 215878163209. The reversal of 215878163204 is 402361878512.

It is not an unprimeable number, because it can be changed into a prime (215878163209) 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 15 ways as a sum of consecutive naturals, for example, 29483864 + ... + 29491184.

It is an arithmetic number, because the mean of its divisors is an integer number (8640809352).

Almost surely, 2^215878163204 is an apocalyptic number.

It is an amenable number.

215878163204 is a deficient number, since it is larger than the sum of its proper divisors (198880685692).

215878163204 is a wasteful number, since it uses less digits than its factorization.

215878163204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11516 (or 11514 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 215878163204 in words is "two hundred fifteen billion, eight hundred seventy-eight million, one hundred sixty-three thousand, two hundred four".