216949323564 has 48 divisors (see below), whose sum is σ = 562567014240. Its totient is φ = 72302837760.

The previous prime is 216949323527. The next prime is 216949323571. The reversal of 216949323564 is 465323949612.

216949323564 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 49 + 32 + 3 + 564 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 216949323564.

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, 396204 + ... + 768684.

It is an arithmetic number, because the mean of its divisors is an integer number (11720146130).

Almost surely, 2^216949323564 is an apocalyptic number.

It is an amenable number.

216949323564 is an abundant number, since it is smaller than the sum of its proper divisors (345617690676).

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

216949323564 is a wasteful number, since it uses less digits than its factorization.

216949323564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377887 (or 377879 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The spelling of 216949323564 in words is "two hundred sixteen billion, nine hundred forty-nine million, three hundred twenty-three thousand, five hundred sixty-four".