79577735581 has 8 divisors (see below), whose sum is σ = 83126280384. Its totient is φ = 76036577760.

The previous prime is 79577735557. The next prime is 79577735639. The reversal of 79577735581 is 18553777597.

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 79577735581 - 2²⁵ = 79544181149 is a prime.

It is a super-2 number, since 2×79577735581² (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 (79577730581) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1824715 + ... + 1867816.

It is an arithmetic number, because the mean of its divisors is an integer number (10390785048).

Almost surely, 2^79577735581 is an apocalyptic number.

It is an amenable number.

79577735581 is a deficient number, since it is larger than the sum of its proper divisors (3548544803).

79577735581 is a wasteful number, since it uses less digits than its factorization.

79577735581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693491.

The product of its digits is 64827000, while the sum is 64.

The spelling of 79577735581 in words is "seventy-nine billion, five hundred seventy-seven million, seven hundred thirty-five thousand, five hundred eighty-one".