11864512800 has 576 divisors, whose sum is σ = 49496832000. Its totient is φ = 2686694400.

The previous prime is 11864512747. The next prime is 11864512813. The reversal of 11864512800 is 821546811.

11864512800 is a `hidden beast` number, since 1 + 1 + 8 + 64 + 512 + 80 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19806901 + ... + 19807499.

It is an arithmetic number, because the mean of its divisors is an integer number (85932000).

Almost surely, 2^11864512800 is an apocalyptic number.

11864512800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11864512800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24748416000).

11864512800 is an abundant number, since it is smaller than the sum of its proper divisors (37632319200).

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

11864512800 is a wasteful number, since it uses less digits than its factorization.

11864512800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 11864512800 in words is "eleven billion, eight hundred sixty-four million, five hundred twelve thousand, eight hundred".