79761131491 has 16 divisors (see below), whose sum is σ = 86094489600. Its totient is φ = 73645070400.

The previous prime is 79761131467. The next prime is 79761131501. The reversal of 79761131491 is 19413116797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79761131491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79761134491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720330 + ... + 823648.

It is an arithmetic number, because the mean of its divisors is an integer number (5380905600).

Almost surely, 2^79761131491 is an apocalyptic number.

79761131491 is a deficient number, since it is larger than the sum of its proper divisors (6333358109).

79761131491 is a wasteful number, since it uses less digits than its factorization.

79761131491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104370.

The product of its digits is 285768, while the sum is 49.

The spelling of 79761131491 in words is "seventy-nine billion, seven hundred sixty-one million, one hundred thirty-one thousand, four hundred ninety-one".