79638673870 has 32 divisors (see below), whose sum is σ = 163844725248. Its totient is φ = 27301922208.

The previous prime is 79638673837. The next prime is 79638673883. The reversal of 79638673870 is 7837683697.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711037 + ... + 815383.

It is an arithmetic number, because the mean of its divisors is an integer number (5120147664).

Almost surely, 2^79638673870 is an apocalyptic number.

79638673870 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

79638673870 is an abundant number, since it is smaller than the sum of its proper divisors (84206051378).

79638673870 is a wasteful number, since it uses less digits than its factorization.

79638673870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115264.

The product of its (nonzero) digits is 64012032, while the sum is 64.

The spelling of 79638673870 in words is "seventy-nine billion, six hundred thirty-eight million, six hundred seventy-three thousand, eight hundred seventy".