11815799712 has 48 divisors (see below), whose sum is σ = 31105946592. Its totient is φ = 3927238400.

The previous prime is 11815799707. The next prime is 11815799719. The reversal of 11815799712 is 21799751811.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×11815799712² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11815799719) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 144039 + ... + 210662.

It is an arithmetic number, because the mean of its divisors is an integer number (648040554).

Almost surely, 2^11815799712 is an apocalyptic number.

11815799712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11815799712 is an abundant number, since it is smaller than the sum of its proper divisors (19290146880).

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

11815799712 is a wasteful number, since it uses less digits than its factorization.

11815799712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355061 (or 355053 counting only the distinct ones).

The product of its digits is 317520, while the sum is 51.

The spelling of 11815799712 in words is "eleven billion, eight hundred fifteen million, seven hundred ninety-nine thousand, seven hundred twelve".