22257891644 has 6 divisors (see below), whose sum is σ = 38951310384. Its totient is φ = 11128945820.

The previous prime is 22257891629. The next prime is 22257891673. The reversal of 22257891644 is 44619875222.

It is a junction number, because it is equal to n+sod(n) for n = 22257891592 and 22257891601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2782236452 + ... + 2782236459.

It is an arithmetic number, because the mean of its divisors is an integer number (6491885064).

Almost surely, 2^22257891644 is an apocalyptic number.

It is an amenable number.

22257891644 is a deficient number, since it is larger than the sum of its proper divisors (16693418740).

22257891644 is a wasteful number, since it uses less digits than its factorization.

22257891644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5564472915 (or 5564472913 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The spelling of 22257891644 in words is "twenty-two billion, two hundred fifty-seven million, eight hundred ninety-one thousand, six hundred forty-four".