216788687250 has 64 divisors (see below), whose sum is σ = 541183458816. Its totient is φ = 57801888000.

The previous prime is 216788687221. The next prime is 216788687261. The reversal of 216788687250 is 52786887612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6450490 + ... + 6484010.

It is an arithmetic number, because the mean of its divisors is an integer number (8455991544).

Almost surely, 2^216788687250 is an apocalyptic number.

216788687250 is an abundant number, since it is smaller than the sum of its proper divisors (324394771566).

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

216788687250 is a wasteful number, since it uses less digits than its factorization.

216788687250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42164 (or 42154 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The spelling of 216788687250 in words is "two hundred sixteen billion, seven hundred eighty-eight million, six hundred eighty-seven thousand, two hundred fifty".