79261756749 has 12 divisors (see below), whose sum is σ = 130844804896. Its totient is φ = 45292432392.

The previous prime is 79261756729. The next prime is 79261756759. The reversal of 79261756749 is 94765716297.

79261756749 is a `hidden beast` number, since 7 + 9 + 2 + 61 + 7 + 567 + 4 + 9 = 666.

It is not a de Polignac number, because 79261756749 - 2²³ = 79253368141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 1258123123 = 79261756749 / (7 + 9 + 2 + 6 + 1 + 7 + 5 + 6 + 7 + 4 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79261756729) 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, 629061499 + ... + 629061624.

Almost surely, 2^79261756749 is an apocalyptic number.

It is an amenable number.

79261756749 is a deficient number, since it is larger than the sum of its proper divisors (51583048147).

79261756749 is a wasteful number, since it uses less digits than its factorization.

79261756749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258123136 (or 1258123133 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 63.

The spelling of 79261756749 in words is "seventy-nine billion, two hundred sixty-one million, seven hundred fifty-six thousand, seven hundred forty-nine".