89568240491 has 4 divisors (see below), whose sum is σ = 91651222872. Its totient is φ = 87485258112.

The previous prime is 89568240467. The next prime is 89568240557. The reversal of 89568240491 is 19404286598.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89568240491 is a prime.

It is a super-2 number, since 2×89568240491² (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 (89568240191) 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, 1041491126 + ... + 1041491211.

It is an arithmetic number, because the mean of its divisors is an integer number (22912805718).

Almost surely, 2^89568240491 is an apocalyptic number.

89568240491 is a deficient number, since it is larger than the sum of its proper divisors (2082982381).

89568240491 is a wasteful number, since it uses less digits than its factorization.

89568240491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082982380.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 89568240491 in words is "eighty-nine billion, five hundred sixty-eight million, two hundred forty thousand, four hundred ninety-one".