79745653992 has 16 divisors (see below), whose sum is σ = 199364135040. Its totient is φ = 26581884656.

The previous prime is 79745653969. The next prime is 79745653997. The reversal of 79745653992 is 29935654797.

It is a super-2 number, since 2×79745653992² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79745653997) 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, 1661367768 + ... + 1661367815.

It is an arithmetic number, because the mean of its divisors is an integer number (12460258440).

Almost surely, 2^79745653992 is an apocalyptic number.

It is an amenable number.

79745653992 is an abundant number, since it is smaller than the sum of its proper divisors (119618481048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79745653992 is a wasteful number, since it uses less digits than its factorization.

79745653992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322735592 (or 3322735588 counting only the distinct ones).

The product of its digits is 128595600, while the sum is 66.

The spelling of 79745653992 in words is "seventy-nine billion, seven hundred forty-five million, six hundred fifty-three thousand, nine hundred ninety-two".