90691042220 has 24 divisors (see below), whose sum is σ = 194044609584. Its totient is φ = 35591955776.

The previous prime is 90691042201. The next prime is 90691042223. The reversal of 90691042220 is 2224019609.

It is not an unprimeable number, because it can be changed into a prime (90691042223) 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, 42777734 + ... + 42779853.

It is an arithmetic number, because the mean of its divisors is an integer number (8085192066).

Almost surely, 2^90691042220 is an apocalyptic number.

It is an amenable number.

90691042220 is an abundant number, since it is smaller than the sum of its proper divisors (103353567364).

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

90691042220 is a wasteful number, since it uses less digits than its factorization.

90691042220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85557649 (or 85557647 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 90691042220 in words is "ninety billion, six hundred ninety-one million, forty-two thousand, two hundred twenty".