11812818528 has 72 divisors (see below), whose sum is σ = 38391666768. Its totient is φ = 3375090432.

The previous prime is 11812818481. The next prime is 11812818547. The reversal of 11812818528 is 82581821811.

It is a happy number.

11812818528 is a `hidden beast` number, since 11 + 81 + 28 + 18 + 528 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2927751 + ... + 2931782.

It is an arithmetic number, because the mean of its divisors is an integer number (533217594).

Almost surely, 2^11812818528 is an apocalyptic number.

11812818528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11812818528 is an abundant number, since it is smaller than the sum of its proper divisors (26578848240).

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

11812818528 is a wasteful number, since it uses less digits than its factorization.

11812818528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5859556 (or 5859545 counting only the distinct ones).

The product of its digits is 81920, while the sum is 45.

The spelling of 11812818528 in words is "eleven billion, eight hundred twelve million, eight hundred eighteen thousand, five hundred twenty-eight".