89861593679 has 24 divisors (see below), whose sum is σ = 107869771296. Its totient is φ = 74346148800.

The previous prime is 89861593663. The next prime is 89861593691. The reversal of 89861593679 is 97639516898.

It is not a de Polignac number, because 89861593679 - 2⁴ = 89861593663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89861593579) 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 23 ways as a sum of consecutive naturals, for example, 290624 + ... + 513989.

It is an arithmetic number, because the mean of its divisors is an integer number (4494573804).

Almost surely, 2^89861593679 is an apocalyptic number.

89861593679 is a deficient number, since it is larger than the sum of its proper divisors (18008177617).

89861593679 is a wasteful number, since it uses less digits than its factorization.

89861593679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804719 (or 804708 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 71.

The spelling of 89861593679 in words is "eighty-nine billion, eight hundred sixty-one million, five hundred ninety-three thousand, six hundred seventy-nine".