11993587536 has 80 divisors (see below), whose sum is σ = 36630691200. Its totient is φ = 3308573184.

The previous prime is 11993587469. The next prime is 11993587547. The reversal of 11993587536 is 63578539911.

It is a super-2 number, since 2×11993587536² (a number of 21 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 15 ways as a sum of consecutive naturals, for example, 605691 + ... + 625178.

It is an arithmetic number, because the mean of its divisors is an integer number (457883640).

Almost surely, 2^11993587536 is an apocalyptic number.

11993587536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11993587536 is an abundant number, since it is smaller than the sum of its proper divisors (24637103664).

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

11993587536 is a wasteful number, since it uses less digits than its factorization.

11993587536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230916 (or 1230910 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 57.

The spelling of 11993587536 in words is "eleven billion, nine hundred ninety-three million, five hundred eighty-seven thousand, five hundred thirty-six".