90940171830 has 32 divisors (see below), whose sum is σ = 225296944128. Its totient is φ = 23468431200.

The previous prime is 90940171801. The next prime is 90940171879. The reversal of 90940171830 is 3817104909.

It is a happy number.

It is a super-2 number, since 2×90940171830² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48891636 + ... + 48893495.

It is an arithmetic number, because the mean of its divisors is an integer number (7040529504).

Almost surely, 2^90940171830 is an apocalyptic number.

90940171830 is an abundant number, since it is smaller than the sum of its proper divisors (134356772298).

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

90940171830 is a wasteful number, since it uses less digits than its factorization.

90940171830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97785172.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 90940171830 in words is "ninety billion, nine hundred forty million, one hundred seventy-one thousand, eight hundred thirty".