79581949634531 has 4 divisors (see below), whose sum is σ = 79639911725952. Its totient is φ = 79523987543112.

The previous prime is 79581949634513. The next prime is 79581949634557. The reversal of 79581949634531 is 13543694918597.

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

It is a cyclic number.

It is not a de Polignac number, because 79581949634531 - 2³⁴ = 79564769765347 is a prime.

It is a super-2 number, since 2×79581949634531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79581949633531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28981043651 + ... + 28981046396.

It is an arithmetic number, because the mean of its divisors is an integer number (19909977931488).

Almost surely, 2^{79581949634531} is an apocalyptic number.

79581949634531 is a deficient number, since it is larger than the sum of its proper divisors (57962091421).

79581949634531 is a wasteful number, since it uses less digits than its factorization.

79581949634531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57962091420.

The product of its digits is 881798400, while the sum is 74.

The spelling of 79581949634531 in words is "seventy-nine trillion, five hundred eighty-one billion, nine hundred forty-nine million, six hundred thirty-four thousand, five hundred thirty-one".