90091177830 has 64 divisors (see below), whose sum is σ = 241971609600. Its totient is φ = 23851467360.

The previous prime is 90091177829. The next prime is 90091177861. The reversal of 90091177830 is 3877119009.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1162726 + ... + 1237785.

It is an arithmetic number, because the mean of its divisors is an integer number (3780806400).

Almost surely, 2^90091177830 is an apocalyptic number.

90091177830 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

90091177830 is an abundant number, since it is smaller than the sum of its proper divisors (151880431770).

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

90091177830 is a wasteful number, since it uses less digits than its factorization.

90091177830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400666 (or 2400660 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The spelling of 90091177830 in words is "ninety billion, ninety-one million, one hundred seventy-seven thousand, eight hundred thirty".