79614251981 has 32 divisors (see below), whose sum is σ = 92726726400. Its totient is φ = 67554247680.

The previous prime is 79614251921. The next prime is 79614252013. The reversal of 79614251981 is 18915241697.

It is a cyclic number.

It is not a de Polignac number, because 79614251981 - 2⁶ = 79614251917 is a prime.

It is a super-2 number, since 2×79614251981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79614251921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11258915 + ... + 11265983.

It is an arithmetic number, because the mean of its divisors is an integer number (2897710200).

Almost surely, 2^79614251981 is an apocalyptic number.

It is an amenable number.

79614251981 is a deficient number, since it is larger than the sum of its proper divisors (13112474419).

79614251981 is a wasteful number, since it uses less digits than its factorization.

79614251981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7589.

The product of its digits is 1088640, while the sum is 53.

The spelling of 79614251981 in words is "seventy-nine billion, six hundred fourteen million, two hundred fifty-one thousand, nine hundred eighty-one".