216486165636 has 72 divisors (see below), whose sum is σ = 589378894104. Its totient is φ = 66604861440.

The previous prime is 216486165583. The next prime is 216486165659. The reversal of 216486165636 is 636561684612.

216486165636 is a `hidden beast` number, since 2 + 1 + 64 + 8 + 6 + 16 + 563 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11277165636 + 205209000000 = 106194^2 + 453000^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8627220 + ... + 8652276.

Almost surely, 2^216486165636 is an apocalyptic number.

216486165636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

216486165636 is an abundant number, since it is smaller than the sum of its proper divisors (372892728468).

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

216486165636 is a wasteful number, since it uses less digits than its factorization.

216486165636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43541 (or 43536 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 216486165636 in words is "two hundred sixteen billion, four hundred eighty-six million, one hundred sixty-five thousand, six hundred thirty-six".