22158168478 has 16 divisors (see below), whose sum is σ = 33459842880. Its totient is φ = 11005120000.

The previous prime is 22158168457. The next prime is 22158168491. The reversal of 22158168478 is 87486185122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133878 + ... + 249478.

It is an arithmetic number, because the mean of its divisors is an integer number (2091240180).

Almost surely, 2^22158168478 is an apocalyptic number.

22158168478 is a deficient number, since it is larger than the sum of its proper divisors (11301674402).

22158168478 is a wasteful number, since it uses less digits than its factorization.

22158168478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116243.

The product of its digits is 1720320, while the sum is 52.

The spelling of 22158168478 in words is "twenty-two billion, one hundred fifty-eight million, one hundred sixty-eight thousand, four hundred seventy-eight".