11636512540 has 24 divisors (see below), whose sum is σ = 24623221392. Its totient is φ = 4619072640.

The previous prime is 11636512519. The next prime is 11636512549. The reversal of 11636512540 is 4521563611.

It is a junction number, because it is equal to n+sod(n) for n = 11636512496 and 11636512505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11636512549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218089 + ... + 2223328.

It is an arithmetic number, because the mean of its divisors is an integer number (1025967558).

Almost surely, 2^11636512540 is an apocalyptic number.

11636512540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11636512540 is an abundant number, since it is smaller than the sum of its proper divisors (12986708852).

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

11636512540 is a wasteful number, since it uses less digits than its factorization.

11636512540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441557 (or 4441555 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

It can be divided in two parts, 11636 and 512540, that added together give a square (524176 = 724²).

The spelling of 11636512540 in words is "eleven billion, six hundred thirty-six million, five hundred twelve thousand, five hundred forty".