79819403764 has 12 divisors (see below), whose sum is σ = 139909621600. Its totient is φ = 39845226168.

The previous prime is 79819403749. The next prime is 79819403767. The reversal of 79819403764 is 46730491897.

It is a super-2 number, since 2×79819403764² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79819403699 and 79819403708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79819403767) 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, 16116144 + ... + 16121095.

Almost surely, 2^79819403764 is an apocalyptic number.

It is an amenable number.

79819403764 is a deficient number, since it is larger than the sum of its proper divisors (60090217836).

79819403764 is a wasteful number, since it uses less digits than its factorization.

79819403764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32237862 (or 32237860 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 79819403764 in words is "seventy-nine billion, eight hundred nineteen million, four hundred three thousand, seven hundred sixty-four".