89861593681 has 8 divisors (see below), whose sum is σ = 91419199200. Its totient is φ = 88305139200.

The previous prime is 89861593663. The next prime is 89861593691. The reversal of 89861593681 is 18639516898.

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 89861593681 - 2¹⁵ = 89861560913 is a prime.

It is a super-2 number, since 2×89861593681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89861593691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129520 + ... + 443281.

It is an arithmetic number, because the mean of its divisors is an integer number (11427399900).

Almost surely, 2^89861593681 is an apocalyptic number.

It is an amenable number.

89861593681 is a deficient number, since it is larger than the sum of its proper divisors (1557605519).

89861593681 is a wasteful number, since it uses less digits than its factorization.

89861593681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575519.

The product of its digits is 22394880, while the sum is 64.

The spelling of 89861593681 in words is "eighty-nine billion, eight hundred sixty-one million, five hundred ninety-three thousand, six hundred eighty-one".