11915902761 has 24 divisors (see below), whose sum is σ = 18501663744. Its totient is φ = 6801772320.

The previous prime is 11915902759. The next prime is 11915902783. The reversal of 11915902761 is 16720951911.

It is a happy number.

It is not a de Polignac number, because 11915902761 - 2¹ = 11915902759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11915902711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95256 + ... + 181398.

It is an arithmetic number, because the mean of its divisors is an integer number (770902656).

Almost surely, 2^11915902761 is an apocalyptic number.

It is an amenable number.

11915902761 is a deficient number, since it is larger than the sum of its proper divisors (6585760983).

11915902761 is an equidigital number, since it uses as much as digits as its factorization.

11915902761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87101 (or 87094 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 42.

The spelling of 11915902761 in words is "eleven billion, nine hundred fifteen million, nine hundred two thousand, seven hundred sixty-one".