90584391138 has 8 divisors (see below), whose sum is σ = 181168782288. Its totient is φ = 30194797044.

The previous prime is 90584391133. The next prime is 90584391173. The reversal of 90584391138 is 83119348509.

It is a sphenic number, since it is the product of 3 distinct primes.

90584391138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (90584391133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7548699256 + ... + 7548699267.

It is an arithmetic number, because the mean of its divisors is an integer number (22646097786).

Almost surely, 2^90584391138 is an apocalyptic number.

90584391138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90584391138 is a wasteful number, since it uses less digits than its factorization.

90584391138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15097398528.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 90584391138 in words is "ninety billion, five hundred eighty-four million, three hundred ninety-one thousand, one hundred thirty-eight".