79461771617 has 4 divisors (see below), whose sum is σ = 79462428720. Its totient is φ = 79461114516.

The previous prime is 79461771601. The next prime is 79461771643. The reversal of 79461771617 is 71617716497.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79461771617 - 2⁴ = 79461771601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79461771677) 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, 88883 + ... + 408440.

It is an arithmetic number, because the mean of its divisors is an integer number (19865607180).

Almost surely, 2^79461771617 is an apocalyptic number.

It is an amenable number.

79461771617 is a deficient number, since it is larger than the sum of its proper divisors (657103).

79461771617 is a wasteful number, since it uses less digits than its factorization.

79461771617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657102.

The product of its digits is 3111696, while the sum is 56.

The spelling of 79461771617 in words is "seventy-nine billion, four hundred sixty-one million, seven hundred seventy-one thousand, six hundred seventeen".