90226555186920 has 128 divisors (see below), whose sum is σ = 290528054087040. Its totient is φ = 22334889369600.

The previous prime is 90226555186883. The next prime is 90226555186927. The reversal of 90226555186920 is 2968155562209.

It is a happy number.

It is a super-2 number, since 2×90226555186920² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (90226555186927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302787406 + ... + 303085245.

It is an arithmetic number, because the mean of its divisors is an integer number (2269750422555).

Almost surely, 2^{90226555186920} is an apocalyptic number.

It is an amenable number.

90226555186920 is an abundant number, since it is smaller than the sum of its proper divisors (200301498900120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90226555186920 is a wasteful number, since it uses less digits than its factorization.

90226555186920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605872755 (or 605872751 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 60.

The spelling of 90226555186920 in words is "ninety trillion, two hundred twenty-six billion, five hundred fifty-five million, one hundred eighty-six thousand, nine hundred twenty".