22157555178 has 32 divisors (see below), whose sum is σ = 48955714560. Its totient is φ = 6629416560.

The previous prime is 22157555159. The next prime is 22157555201. The reversal of 22157555178 is 87155575122.

It is a super-2 number, since 2×22157555178² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2119600 + ... + 2130027.

It is an arithmetic number, because the mean of its divisors is an integer number (1529866080).

Almost surely, 2^22157555178 is an apocalyptic number.

22157555178 is an abundant number, since it is smaller than the sum of its proper divisors (26798159382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22157555178 is a wasteful number, since it uses less digits than its factorization.

22157555178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249722.

The product of its digits is 980000, while the sum is 48.

The spelling of 22157555178 in words is "twenty-two billion, one hundred fifty-seven million, five hundred fifty-five thousand, one hundred seventy-eight".