79706857784 has 16 divisors (see below), whose sum is σ = 150821464200. Its totient is φ = 39487800672.

The previous prime is 79706857733. The next prime is 79706857787. The reversal of 79706857784 is 48775860797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79706857787) 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, 45702602 + ... + 45704345.

Almost surely, 2^79706857784 is an apocalyptic number.

It is an amenable number.

79706857784 is a deficient number, since it is larger than the sum of its proper divisors (71114606416).

79706857784 is a wasteful number, since it uses less digits than its factorization.

79706857784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91407062 (or 91407058 counting only the distinct ones).

The product of its (nonzero) digits is 165957120, while the sum is 68.

The spelling of 79706857784 in words is "seventy-nine billion, seven hundred six million, eight hundred fifty-seven thousand, seven hundred eighty-four".