89951920081 has 16 divisors (see below), whose sum is σ = 94160683008. Its totient is φ = 85768333200.

The previous prime is 89951920049. The next prime is 89951920109. The reversal of 89951920081 is 18002915998.

It is a cyclic number.

It is not a de Polignac number, because 89951920081 - 2⁵ = 89951920049 is a prime.

It is a super-2 number, since 2×89951920081² (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 (89951920181) 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, 14340976 + ... + 14347246.

It is an arithmetic number, because the mean of its divisors is an integer number (5885042688).

Almost surely, 2^89951920081 is an apocalyptic number.

It is an amenable number.

89951920081 is a deficient number, since it is larger than the sum of its proper divisors (4208762927).

89951920081 is a wasteful number, since it uses less digits than its factorization.

89951920081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8172.

The product of its (nonzero) digits is 466560, while the sum is 52.

The spelling of 89951920081 in words is "eighty-nine billion, nine hundred fifty-one million, nine hundred twenty thousand, eighty-one".