90869057281 has 4 divisors (see below), whose sum is σ = 90927345600. Its totient is φ = 90810768964.

The previous prime is 90869057269. The next prime is 90869057291. The reversal of 90869057281 is 18275096809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90869057281 - 2⁹ = 90869056769 is a prime.

It is a super-2 number, since 2×90869057281² (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 (90869057291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29141821 + ... + 29144938.

It is an arithmetic number, because the mean of its divisors is an integer number (22731836400).

Almost surely, 2^90869057281 is an apocalyptic number.

It is an amenable number.

90869057281 is a deficient number, since it is larger than the sum of its proper divisors (58288319).

90869057281 is a wasteful number, since it uses less digits than its factorization.

90869057281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58288318.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 90869057281 in words is "ninety billion, eight hundred sixty-nine million, fifty-seven thousand, two hundred eighty-one".