79491855249 has 15 divisors (see below), whose sum is σ = 118750883097. Its totient is φ = 52992878508.

The previous prime is 79491855239. The next prime is 79491855319. The reversal of 79491855249 is 94255819497.

The square root of 79491855249 is 281943.

It is a perfect power (a square), and thus also a powerful number.

79491855249 is a `hidden beast` number, since 7 + 94 + 9 + 18 + 5 + 524 + 9 = 666.

It is not a de Polignac number, because 79491855249 - 2⁹ = 79491854737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79491855239) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2521824 + ... + 2553150.

Almost surely, 2^79491855249 is an apocalyptic number.

79491855249 is the 281943-rd square number.

79491855249 is the 140972-nd centered octagonal number.

It is an amenable number.

79491855249 is a deficient number, since it is larger than the sum of its proper divisors (39259027848).

79491855249 is an frugal number, since it uses more digits than its factorization.

79491855249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62666 (or 31330 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 79491855249 in words is "seventy-nine billion, four hundred ninety-one million, eight hundred fifty-five thousand, two hundred forty-nine".