79471638693 has 48 divisors (see below), whose sum is σ = 119734692480. Its totient is φ = 50759280000.

The previous prime is 79471638671. The next prime is 79471638703. The reversal of 79471638693 is 39683617497.

79471638693 is a `hidden beast` number, since 79 + 471 + 6 + 3 + 8 + 6 + 93 = 666.

It is not a de Polignac number, because 79471638693 - 2⁵ = 79471638661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79471638693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79471638293) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4240243 + ... + 4258943.

It is an arithmetic number, because the mean of its divisors is an integer number (2494472760).

Almost surely, 2^79471638693 is an apocalyptic number.

It is an amenable number.

79471638693 is a deficient number, since it is larger than the sum of its proper divisors (40263053787).

79471638693 is a wasteful number, since it uses less digits than its factorization.

79471638693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18970 (or 18967 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 79471638693 in words is "seventy-nine billion, four hundred seventy-one million, six hundred thirty-eight thousand, six hundred ninety-three".