216555659952 has 40 divisors (see below), whose sum is σ = 559552286064. Its totient is φ = 72170145024.

The previous prime is 216555659941. The next prime is 216555659963. The reversal of 216555659952 is 259956555612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216555659941) and next prime (216555659963).

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, 237663 + ... + 699710.

Almost surely, 2^216555659952 is an apocalyptic number.

It is an amenable number.

216555659952 is an abundant number, since it is smaller than the sum of its proper divisors (342996626112).

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

216555659952 is a wasteful number, since it uses less digits than its factorization.

216555659952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942197 (or 942191 counting only the distinct ones).

The product of its digits is 36450000, while the sum is 60.

The spelling of 216555659952 in words is "two hundred sixteen billion, five hundred fifty-five million, six hundred fifty-nine thousand, nine hundred fifty-two".