216815070984 has 32 divisors (see below), whose sum is σ = 542138620320. Its totient is φ = 72258231296.

The previous prime is 216815070961. The next prime is 216815071001. The reversal of 216815070984 is 489070518612.

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, 709209 + ... + 967784.

It is an arithmetic number, because the mean of its divisors is an integer number (16941831885).

Almost surely, 2^216815070984 is an apocalyptic number.

216815070984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216815070984 is an abundant number, since it is smaller than the sum of its proper divisors (325323549336).

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

216815070984 is a wasteful number, since it uses less digits than its factorization.

216815070984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682389 (or 1682385 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 216815070984 in words is "two hundred sixteen billion, eight hundred fifteen million, seventy thousand, nine hundred eighty-four".