22191945457 has 8 divisors (see below), whose sum is σ = 24210692352. Its totient is φ = 20173414800.

The previous prime is 22191945449. The next prime is 22191945481. The reversal of 22191945457 is 75454919122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22191945457 - 2³ = 22191945449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22191945457.

It is not an unprimeable number, because it can be changed into a prime (22191945407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221728 + ... + 305854.

It is an arithmetic number, because the mean of its divisors is an integer number (3026336544).

Almost surely, 2^22191945457 is an apocalyptic number.

It is an amenable number.

22191945457 is a deficient number, since it is larger than the sum of its proper divisors (2018746895).

22191945457 is a wasteful number, since it uses less digits than its factorization.

22191945457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108119.

The product of its digits is 907200, while the sum is 49.

The spelling of 22191945457 in words is "twenty-two billion, one hundred ninety-one million, nine hundred forty-five thousand, four hundred fifty-seven".