90490953217 has 16 divisors (see below), whose sum is σ = 106765210624. Its totient is φ = 75053952000.

The previous prime is 90490953173. The next prime is 90490953253. The reversal of 90490953217 is 71235909409.

It is a cyclic number.

It is not a de Polignac number, because 90490953217 - 2¹⁹ = 90490428929 is a prime.

It is a super-2 number, since 2×90490953217² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90490953517) 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, 3293617 + ... + 3320977.

It is an arithmetic number, because the mean of its divisors is an integer number (6672825664).

Almost surely, 2^90490953217 is an apocalyptic number.

It is an amenable number.

90490953217 is a deficient number, since it is larger than the sum of its proper divisors (16274257407).

90490953217 is a wasteful number, since it uses less digits than its factorization.

90490953217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42640.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 90490953217 in words is "ninety billion, four hundred ninety million, nine hundred fifty-three thousand, two hundred seventeen".