79558887761 has 4 divisors (see below), whose sum is σ = 80131254000. Its totient is φ = 78986521524.

The previous prime is 79558887703. The next prime is 79558887781. The reversal of 79558887761 is 16778885597.

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 79558887761 - 2⁶ = 79558887697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79558887781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286182911 + ... + 286183188.

It is an arithmetic number, because the mean of its divisors is an integer number (20032813500).

Almost surely, 2^79558887761 is an apocalyptic number.

It is an amenable number.

79558887761 is a deficient number, since it is larger than the sum of its proper divisors (572366239).

79558887761 is a wasteful number, since it uses less digits than its factorization.

79558887761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572366238.

The product of its digits is 237081600, while the sum is 71.

The spelling of 79558887761 in words is "seventy-nine billion, five hundred fifty-eight million, eight hundred eighty-seven thousand, seven hundred sixty-one".