79404159581 has 8 divisors (see below), whose sum is σ = 80039491584. Its totient is φ = 78768985680.

The previous prime is 79404159559. The next prime is 79404159599. The reversal of 79404159581 is 18595140497.

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

It is a cyclic number.

It is not a de Polignac number, because 79404159581 - 2²⁶ = 79337050717 is a prime.

It is a super-2 number, since 2×79404159581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79404155581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099496 + ... + 1169486.

It is an arithmetic number, because the mean of its divisors is an integer number (10004936448).

Almost surely, 2^79404159581 is an apocalyptic number.

It is an amenable number.

79404159581 is a deficient number, since it is larger than the sum of its proper divisors (635332003).

79404159581 is a wasteful number, since it uses less digits than its factorization.

79404159581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79051.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 79404159581 in words is "seventy-nine billion, four hundred four million, one hundred fifty-nine thousand, five hundred eighty-one".