79511254989 has 4 divisors (see below), whose sum is σ = 106015006656. Its totient is φ = 53007503324.

The previous prime is 79511254961. The next prime is 79511254993. The reversal of 79511254989 is 98945211597.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79511254989 - 2¹¹ = 79511252941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79511254939) 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, 13251875829 + ... + 13251875834.

It is an arithmetic number, because the mean of its divisors is an integer number (26503751664).

Almost surely, 2^79511254989 is an apocalyptic number.

It is an amenable number.

79511254989 is a deficient number, since it is larger than the sum of its proper divisors (26503751667).

79511254989 is a wasteful number, since it uses less digits than its factorization.

79511254989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26503751666.

The product of its digits is 8164800, while the sum is 60.

The spelling of 79511254989 in words is "seventy-nine billion, five hundred eleven million, two hundred fifty-four thousand, nine hundred eighty-nine".