12536905518 has 32 divisors (see below), whose sum is σ = 27865706400. Its totient is φ = 4178081088.

The previous prime is 12536905499. The next prime is 12536905529. The reversal of 12536905518 is 81550963521.

12536905518 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 6 + 90 + 551 + 8 = 666.

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, 262728 + ... + 306756.

It is an arithmetic number, because the mean of its divisors is an integer number (870803325).

Almost surely, 2^12536905518 is an apocalyptic number.

12536905518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12536905518 is an abundant number, since it is smaller than the sum of its proper divisors (15328800882).

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

12536905518 is a wasteful number, since it uses less digits than its factorization.

12536905518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49313 (or 49307 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 12536905518 in words is "twelve billion, five hundred thirty-six million, nine hundred five thousand, five hundred eighteen".