216869075964 has 36 divisors (see below), whose sum is σ = 565880602560. Its totient is φ = 69957766080.

The previous prime is 216869075959. The next prime is 216869075977. The reversal of 216869075964 is 469570968612.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×216869075964² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97162449 + ... + 97164680.

Almost surely, 2^216869075964 is an apocalyptic number.

It is an amenable number.

216869075964 is an abundant number, since it is smaller than the sum of its proper divisors (349011526596).

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

216869075964 is a wasteful number, since it uses less digits than its factorization.

216869075964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194327170 (or 194327165 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 216869075964 in words is "two hundred sixteen billion, eight hundred sixty-nine million, seventy-five thousand, nine hundred sixty-four".