89539208478721 has 16 divisors (see below), whose sum is σ = 92872295530560. Its totient is φ = 86254228468800.

The previous prime is 89539208478697. The next prime is 89539208478751. The reversal of 89539208478721 is 12787480293598.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89539208478721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89539208478751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139844250 + ... + 140483068.

It is an arithmetic number, because the mean of its divisors is an integer number (5804518470660).

Almost surely, 2^{89539208478721} is an apocalyptic number.

It is an amenable number.

89539208478721 is a deficient number, since it is larger than the sum of its proper divisors (3333087051839).

89539208478721 is a wasteful number, since it uses less digits than its factorization.

89539208478721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676464.

The product of its (nonzero) digits is 487710720, while the sum is 73.

The spelling of 89539208478721 in words is "eighty-nine trillion, five hundred thirty-nine billion, two hundred eight million, four hundred seventy-eight thousand, seven hundred twenty-one".