79401591361 has 4 divisors (see below), whose sum is σ = 82139577300. Its totient is φ = 76663605424.

The previous prime is 79401591343. The next prime is 79401591371. The reversal of 79401591361 is 16319510497.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65277695025 + 14123896336 = 255495^2 + 118844^2 .

It is a cyclic number.

It is not a de Polignac number, because 79401591361 - 2³⁵ = 45041852993 is a prime.

It is a super-2 number, since 2×79401591361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79401591371) 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, 1368992926 + ... + 1368992983.

It is an arithmetic number, because the mean of its divisors is an integer number (20534894325).

Almost surely, 2^79401591361 is an apocalyptic number.

It is an amenable number.

79401591361 is a deficient number, since it is larger than the sum of its proper divisors (2737985939).

79401591361 is a wasteful number, since it uses less digits than its factorization.

79401591361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737985938.

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 79401591361 in words is "seventy-nine billion, four hundred one million, five hundred ninety-one thousand, three hundred sixty-one".