216870572555 has 16 divisors (see below), whose sum is σ = 320301153984. Its totient is φ = 137271922560.

The previous prime is 216870572537. The next prime is 216870572587. The reversal of 216870572555 is 555275078612.

It is not a de Polignac number, because 216870572555 - 2²⁰ = 216869523979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216870572497 and 216870572506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238318856 + ... + 238319765.

It is an arithmetic number, because the mean of its divisors is an integer number (20018822124).

Almost surely, 2^216870572555 is an apocalyptic number.

216870572555 is a deficient number, since it is larger than the sum of its proper divisors (103430581429).

216870572555 is a wasteful number, since it uses less digits than its factorization.

216870572555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476638646.

The product of its (nonzero) digits is 5880000, while the sum is 53.

The spelling of 216870572555 in words is "two hundred sixteen billion, eight hundred seventy million, five hundred seventy-two thousand, five hundred fifty-five".