90170905901 has 8 divisors (see below), whose sum is σ = 91758139200. Its totient is φ = 88585636480.

The previous prime is 90170905871. The next prime is 90170905943. The reversal of 90170905901 is 10950907109.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90170905901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90170905961) 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, 398180 + ... + 582141.

It is an arithmetic number, because the mean of its divisors is an integer number (11469767400).

Almost surely, 2^90170905901 is an apocalyptic number.

It is an amenable number.

90170905901 is a deficient number, since it is larger than the sum of its proper divisors (1587233299).

90170905901 is a wasteful number, since it uses less digits than its factorization.

90170905901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981939.

The product of its (nonzero) digits is 25515, while the sum is 41.

The spelling of 90170905901 in words is "ninety billion, one hundred seventy million, nine hundred five thousand, nine hundred one".