89131777065 has 96 divisors (see below), whose sum is σ = 166612432896. Its totient is φ = 43950551040.

The previous prime is 89131777061. The next prime is 89131777067. The reversal of 89131777065 is 56077713198.

It is not a de Polignac number, because 89131777065 - 2² = 89131777061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89131777061) 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 95 ways as a sum of consecutive naturals, for example, 52522297 + ... + 52523993.

It is an arithmetic number, because the mean of its divisors is an integer number (1735546176).

Almost surely, 2^89131777065 is an apocalyptic number.

It is an amenable number.

89131777065 is a deficient number, since it is larger than the sum of its proper divisors (77480655831).

89131777065 is a wasteful number, since it uses less digits than its factorization.

89131777065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 54.

The spelling of 89131777065 in words is "eighty-nine billion, one hundred thirty-one million, seven hundred seventy-seven thousand, sixty-five".