78794992538 has 8 divisors (see below), whose sum is σ = 118193764032. Its totient is φ = 39397071196.

The previous prime is 78794992501. The next prime is 78794992553. The reversal of 78794992538 is 83529949787.

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

It is a super-3 number, since 3×78794992538³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128831 + ... + 417357.

It is an arithmetic number, because the mean of its divisors is an integer number (14774220504).

Almost surely, 2^78794992538 is an apocalyptic number.

78794992538 is a deficient number, since it is larger than the sum of its proper divisors (39398771494).

78794992538 is a wasteful number, since it uses less digits than its factorization.

78794992538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425076.

The product of its digits is 274337280, while the sum is 71.

The spelling of 78794992538 in words is "seventy-eight billion, seven hundred ninety-four million, nine hundred ninety-two thousand, five hundred thirty-eight".