916505985025 has 12 divisors (see below), whose sum is σ = 1162896897712. Its totient is φ = 716153513040.

The previous prime is 916505985013. The next prime is 916505985041. The reversal of 916505985025 is 520589505619.

It is a happy number.

It is not a de Polignac number, because 916505985025 - 2²⁹ = 915969114113 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian 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, 426280779 + ... + 426282928.

Almost surely, 2^916505985025 is an apocalyptic number.

It is an amenable number.

916505985025 is a deficient number, since it is larger than the sum of its proper divisors (246390912687).

916505985025 is a wasteful number, since it uses less digits than its factorization.

916505985025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852563760 (or 852563755 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 55.

The spelling of 916505985025 in words is "nine hundred sixteen billion, five hundred five million, nine hundred eighty-five thousand, twenty-five".