11658591979 has 4 divisors (see below), whose sum is σ = 11669162976. Its totient is φ = 11648020984.

The previous prime is 11658591937. The next prime is 11658591983. The reversal of 11658591979 is 97919585611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11658591979 - 2⁷ = 11658591851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11658591079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5283844 + ... + 5286049.

It is an arithmetic number, because the mean of its divisors is an integer number (2917290744).

Almost surely, 2^11658591979 is an apocalyptic number.

11658591979 is a deficient number, since it is larger than the sum of its proper divisors (10570997).

11658591979 is a wasteful number, since it uses less digits than its factorization.

11658591979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10570996.

The product of its digits is 6123600, while the sum is 61.

The spelling of 11658591979 in words is "eleven billion, six hundred fifty-eight million, five hundred ninety-one thousand, nine hundred seventy-nine".