90881740136 has 32 divisors (see below), whose sum is σ = 186617839680. Its totient is φ = 41149132800.

The previous prime is 90881740133. The next prime is 90881740151. The reversal of 90881740136 is 63104718809.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (90881740133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986620 + ... + 2031851.

It is an arithmetic number, because the mean of its divisors is an integer number (5831807490).

Almost surely, 2^90881740136 is an apocalyptic number.

It is an amenable number.

90881740136 is an abundant number, since it is smaller than the sum of its proper divisors (95736099544).

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

90881740136 is a wasteful number, since it uses less digits than its factorization.

90881740136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018745 (or 4018741 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 90881740136 in words is "ninety billion, eight hundred eighty-one million, seven hundred forty thousand, one hundred thirty-six".