90455689281 has 16 divisors (see below), whose sum is σ = 121760038400. Its totient is φ = 59727984768.

The previous prime is 90455689267. The next prime is 90455689297. The reversal of 90455689281 is 18298655409.

It is a happy number.

It is not a de Polignac number, because 90455689281 - 2²⁷ = 90321471553 is a prime.

It is a super-2 number, since 2×90455689281² (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 (90455689781) 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, 838245 + ... + 939981.

It is an arithmetic number, because the mean of its divisors is an integer number (7610002400).

Almost surely, 2^90455689281 is an apocalyptic number.

It is an amenable number.

90455689281 is a deficient number, since it is larger than the sum of its proper divisors (31304349119).

90455689281 is a wasteful number, since it uses less digits than its factorization.

90455689281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104568.

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 90455689281 in words is "ninety billion, four hundred fifty-five million, six hundred eighty-nine thousand, two hundred eighty-one".