90640801090 has 32 divisors (see below), whose sum is σ = 186481635840. Its totient is φ = 31073419584.

The previous prime is 90640801087. The next prime is 90640801099. The reversal of 90640801090 is 9010804609.

It is not an unprimeable number, because it can be changed into a prime (90640801099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614791 + ... + 747829.

It is an arithmetic number, because the mean of its divisors is an integer number (5827551120).

Almost surely, 2^90640801090 is an apocalyptic number.

90640801090 is an abundant number, since it is smaller than the sum of its proper divisors (95840834750).

90640801090 is a wasteful number, since it uses less digits than its factorization.

90640801090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142786.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 90640801090 in words is "ninety billion, six hundred forty million, eight hundred one thousand, ninety".