90056571797 has 16 divisors (see below), whose sum is σ = 92492400000. Its totient is φ = 87636717504.

The previous prime is 90056571757. The next prime is 90056571809. The reversal of 90056571797 is 79717565009.

It is a cyclic number.

It is not a de Polignac number, because 90056571797 - 2³⁰ = 88982829973 is a prime.

It is a super-2 number, since 2×90056571797² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90056571757) 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, 29247104 + ... + 29250182.

It is an arithmetic number, because the mean of its divisors is an integer number (5780775000).

Almost surely, 2^90056571797 is an apocalyptic number.

It is an amenable number.

90056571797 is a deficient number, since it is larger than the sum of its proper divisors (2435828203).

90056571797 is a wasteful number, since it uses less digits than its factorization.

90056571797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420.

The product of its (nonzero) digits is 4167450, while the sum is 56.

The spelling of 90056571797 in words is "ninety billion, fifty-six million, five hundred seventy-one thousand, seven hundred ninety-seven".