216636635652456 has 64 divisors (see below), whose sum is σ = 577965271726080. Its totient is φ = 67429281669120.

The previous prime is 216636635652443. The next prime is 216636635652461. The reversal of 216636635652456 is 654256536636612.

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, 2090389705 + ... + 2090493336.

It is an arithmetic number, because the mean of its divisors is an integer number (9030707370720).

Almost surely, 2^{216636635652456} is an apocalyptic number.

It is an amenable number.

216636635652456 is an abundant number, since it is smaller than the sum of its proper divisors (361328636073624).

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

216636635652456 is a wasteful number, since it uses less digits than its factorization.

216636635652456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180883194 (or 4180883190 counting only the distinct ones).

The product of its digits is 839808000, while the sum is 66.

The spelling of 216636635652456 in words is "two hundred sixteen trillion, six hundred thirty-six billion, six hundred thirty-five million, six hundred fifty-two thousand, four hundred fifty-six".