89901659721 has 8 divisors (see below), whose sum is σ = 120968594560. Its totient is φ = 59384582352.

The previous prime is 89901659677. The next prime is 89901659753. The reversal of 89901659721 is 12795610998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89901659721 - 2⁷ = 89901659593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89901659621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137463985 + ... + 137464638.

It is an arithmetic number, because the mean of its divisors is an integer number (15121074320).

Almost surely, 2^89901659721 is an apocalyptic number.

It is an amenable number.

89901659721 is a deficient number, since it is larger than the sum of its proper divisors (31066934839).

89901659721 is a wasteful number, since it uses less digits than its factorization.

89901659721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274928735.

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 89901659721 in words is "eighty-nine billion, nine hundred one million, six hundred fifty-nine thousand, seven hundred twenty-one".