216436653664 has 48 divisors (see below), whose sum is σ = 531253610496. Its totient is φ = 84325968000.

The previous prime is 216436653649. The next prime is 216436653701. The reversal of 216436653664 is 466356634612.

It is a congruent number.

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, 43917312 + ... + 43922239.

It is an arithmetic number, because the mean of its divisors is an integer number (11067783552).

Almost surely, 2^216436653664 is an apocalyptic number.

It is an amenable number.

216436653664 is an abundant number, since it is smaller than the sum of its proper divisors (314816956832).

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

216436653664 is a wasteful number, since it uses less digits than its factorization.

216436653664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87839579 (or 87839571 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 52.

The spelling of 216436653664 in words is "two hundred sixteen billion, four hundred thirty-six million, six hundred fifty-three thousand, six hundred sixty-four".