10890421257 has 4 divisors (see below), whose sum is σ = 14520561680. Its totient is φ = 7260280836.

The previous prime is 10890421237. The next prime is 10890421261. The reversal of 10890421257 is 75212409801.

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 not a de Polignac number, because 10890421257 - 2²⁶ = 10823312393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10890421237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815070207 + ... + 1815070212.

It is an arithmetic number, because the mean of its divisors is an integer number (3630140420).

Almost surely, 2^10890421257 is an apocalyptic number.

It is an amenable number.

10890421257 is a deficient number, since it is larger than the sum of its proper divisors (3630140423).

10890421257 is an equidigital number, since it uses as much as digits as its factorization.

10890421257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630140422.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 10890421257 in words is "ten billion, eight hundred ninety million, four hundred twenty-one thousand, two hundred fifty-seven".