79551964693 has 8 divisors (see below), whose sum is σ = 80695986200. Its totient is φ = 78409410048.

The previous prime is 79551964643. The next prime is 79551964699. The reversal of 79551964693 is 39646915597.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 195384484 + 79356580209 = 13978^2 + 281703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79551964693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79551964699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257238 + ... + 474631.

It is an arithmetic number, because the mean of its divisors is an integer number (10086998275).

Almost surely, 2^79551964693 is an apocalyptic number.

79551964693 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

79551964693 is a deficient number, since it is larger than the sum of its proper divisors (1144021507).

79551964693 is a wasteful number, since it uses less digits than its factorization.

79551964693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733431.

The product of its digits is 55112400, while the sum is 64.

The spelling of 79551964693 in words is "seventy-nine billion, five hundred fifty-one million, nine hundred sixty-four thousand, six hundred ninety-three".