11559999979 has 12 divisors (see below), whose sum is σ = 12926014920. Its totient is φ = 10252755200.

The previous prime is 11559999973. The next prime is 11560000013. The reversal of 11559999979 is 97999995511.

It is not a de Polignac number, because 11559999979 - 2⁹ = 11559999467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11559999973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 294094 + ... + 331075.

It is an arithmetic number, because the mean of its divisors is an integer number (1077167910).

Almost surely, 2^11559999979 is an apocalyptic number.

11559999979 is a deficient number, since it is larger than the sum of its proper divisors (1366014941).

11559999979 is an equidigital number, since it uses as much as digits as its factorization.

11559999979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625262 (or 625221 counting only the distinct ones).

The product of its digits is 93002175, while the sum is 73.

The spelling of 11559999979 in words is "eleven billion, five hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".