90291816657 has 48 divisors (see below), whose sum is σ = 160551026688. Its totient is φ = 47760023520.

The previous prime is 90291816647. The next prime is 90291816677. The reversal of 90291816657 is 75661819209.

It is not a de Polignac number, because 90291816657 - 2⁷ = 90291816529 is a prime.

It is a super-2 number, since 2×90291816657² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90291816647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960133 + ... + 1049970.

It is an arithmetic number, because the mean of its divisors is an integer number (3344813056).

Almost surely, 2^90291816657 is an apocalyptic number.

It is an amenable number.

90291816657 is a deficient number, since it is larger than the sum of its proper divisors (70259210031).

90291816657 is a wasteful number, since it uses less digits than its factorization.

90291816657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010170 (or 2010167 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 90291816657 in words is "ninety billion, two hundred ninety-one million, eight hundred sixteen thousand, six hundred fifty-seven".