85663815516 has 48 divisors (see below), whose sum is σ = 222881813280. Its totient is φ = 28452977280.

The previous prime is 85663815481. The next prime is 85663815533. The reversal of 85663815516 is 61551836658.

85663815516 is a `hidden beast` number, since 8 + 5 + 6 + 6 + 3 + 81 + 551 + 6 = 666.

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

It is a congruent number.

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, 1381011 + ... + 1441706.

It is an arithmetic number, because the mean of its divisors is an integer number (4643371110).

Almost surely, 2^85663815516 is an apocalyptic number.

It is an amenable number.

85663815516 is an abundant number, since it is smaller than the sum of its proper divisors (137217997764).

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

85663815516 is a wasteful number, since it uses less digits than its factorization.

85663815516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823011 (or 2823003 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 85663815516 in words is "eighty-five billion, six hundred sixty-three million, eight hundred fifteen thousand, five hundred sixteen".