216995375980 has 24 divisors (see below), whose sum is σ = 455777622720. Its totient is φ = 86781515520.

The previous prime is 216995375957. The next prime is 216995376049. The reversal of 216995375980 is 89573599612.

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, 932445 + ... + 1141684.

It is an arithmetic number, because the mean of its divisors is an integer number (18990734280).

Almost surely, 2^216995375980 is an apocalyptic number.

216995375980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216995375980 is an abundant number, since it is smaller than the sum of its proper divisors (238782246740).

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

216995375980 is a wasteful number, since it uses less digits than its factorization.

216995375980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079369 (or 2079367 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 64.

The spelling of 216995375980 in words is "two hundred sixteen billion, nine hundred ninety-five million, three hundred seventy-five thousand, nine hundred eighty".