22172878858 has 8 divisors (see below), whose sum is σ = 35817727428. Its totient is φ = 10233636384.

The previous prime is 22172878817. The next prime is 22172878909. The reversal of 22172878858 is 85887827122.

It is a happy number.

22172878858 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17888260009 + 4284618849 = 133747^2 + 65457^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426401491 + ... + 426401542.

Almost surely, 2^22172878858 is an apocalyptic number.

22172878858 is a deficient number, since it is larger than the sum of its proper divisors (13644848570).

22172878858 is a wasteful number, since it uses less digits than its factorization.

22172878858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852803048.

The product of its digits is 8028160, while the sum is 58.

The spelling of 22172878858 in words is "twenty-two billion, one hundred seventy-two million, eight hundred seventy-eight thousand, eight hundred fifty-eight".