79571004638 has 4 divisors (see below), whose sum is σ = 119356506960. Its totient is φ = 39785502318.

The previous prime is 79571004607. The next prime is 79571004671. The reversal of 79571004638 is 83640017597.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×79571004638² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19892751158 + ... + 19892751161.

It is an arithmetic number, because the mean of its divisors is an integer number (29839126740).

Almost surely, 2^79571004638 is an apocalyptic number.

79571004638 is a deficient number, since it is larger than the sum of its proper divisors (39785502322).

79571004638 is a wasteful number, since it uses less digits than its factorization.

79571004638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39785502321.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 79571004638 in words is "seventy-nine billion, five hundred seventy-one million, four thousand, six hundred thirty-eight".