89777776865 has 32 divisors (see below), whose sum is σ = 125552885760. Its totient is φ = 60353072064.

The previous prime is 89777776819. The next prime is 89777776867. The reversal of 89777776865 is 56867777798.

It is a cyclic number.

It is not a de Polignac number, because 89777776865 - 2²⁶ = 89710668001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (89777776867) 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 31 ways as a sum of consecutive naturals, for example, 698624 + ... + 817086.

It is an arithmetic number, because the mean of its divisors is an integer number (3923527680).

Almost surely, 2^89777776865 is an apocalyptic number.

It is an amenable number.

89777776865 is a deficient number, since it is larger than the sum of its proper divisors (35775108895).

89777776865 is a wasteful number, since it uses less digits than its factorization.

89777776865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118901.

The product of its digits is 1742549760, while the sum is 77.

The spelling of 89777776865 in words is "eighty-nine billion, seven hundred seventy-seven million, seven hundred seventy-six thousand, eight hundred sixty-five".