11979349131717 has 40 divisors (see below), whose sum is σ = 19522369009440. Its totient is φ = 7260038022240.

The previous prime is 11979349131709. The next prime is 11979349131719. The reversal of 11979349131717 is 71713194397911.

11979349131717 is a `hidden beast` number, since 1 + 1 + 9 + 79 + 3 + 491 + 3 + 1 + 71 + 7 = 666.

It is not a de Polignac number, because 11979349131717 - 2³ = 11979349131709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979349131719) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43905238 + ... + 44177240.

It is an arithmetic number, because the mean of its divisors is an integer number (488059225236).

Almost surely, 2^{11979349131717} is an apocalyptic number.

It is an amenable number.

11979349131717 is a deficient number, since it is larger than the sum of its proper divisors (7543019877723).

11979349131717 is a wasteful number, since it uses less digits than its factorization.

11979349131717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321455 (or 321446 counting only the distinct ones).

The product of its digits is 9001692, while the sum is 63.

The spelling of 11979349131717 in words is "eleven trillion, nine hundred seventy-nine billion, three hundred forty-nine million, one hundred thirty-one thousand, seven hundred seventeen".