89900811881 has 4 divisors (see below), whose sum is σ = 89912042064. Its totient is φ = 89889581700.

The previous prime is 89900811877. The next prime is 89900811893. The reversal of 89900811881 is 18811800998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89900811881 - 2² = 89900811877 is a prime.

It is a super-2 number, since 2×89900811881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89900811811) 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 3 ways as a sum of consecutive naturals, for example, 5603075 + ... + 5619096.

It is an arithmetic number, because the mean of its divisors is an integer number (22478010516).

Almost surely, 2^89900811881 is an apocalyptic number.

It is an amenable number.

89900811881 is a deficient number, since it is larger than the sum of its proper divisors (11230183).

89900811881 is a wasteful number, since it uses less digits than its factorization.

89900811881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11230182.

The product of its (nonzero) digits is 331776, while the sum is 53.

The spelling of 89900811881 in words is "eighty-nine billion, nine hundred million, eight hundred eleven thousand, eight hundred eighty-one".