22257891645 has 32 divisors (see below), whose sum is σ = 40189806720. Its totient is φ = 10419575040.

The previous prime is 22257891629. The next prime is 22257891673. The reversal of 22257891645 is 54619875222.

It is not a de Polignac number, because 22257891645 - 2⁴ = 22257891629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2321014 + ... + 2330583.

It is an arithmetic number, because the mean of its divisors is an integer number (1255931460).

Almost surely, 2^22257891645 is an apocalyptic number.

It is an amenable number.

22257891645 is a deficient number, since it is larger than the sum of its proper divisors (17931915075).

22257891645 is a wasteful number, since it uses less digits than its factorization.

22257891645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651645.

The product of its digits is 2419200, while the sum is 51.

The spelling of 22257891645 in words is "twenty-two billion, two hundred fifty-seven million, eight hundred ninety-one thousand, six hundred forty-five".