226158278391 has 10 divisors (see below), whose sum is σ = 337841378952. Its totient is φ = 150772185540.

The previous prime is 226158278383. The next prime is 226158278417. The reversal of 226158278391 is 193872851622.

226158278391 is a `hidden beast` number, since 2 + 26 + 1 + 582 + 7 + 8 + 39 + 1 = 666.

It is not a de Polignac number, because 226158278391 - 2³ = 226158278383 is a prime.

It is a super-2 number, since 2×226158278391² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226158278321) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1396038675 + ... + 1396038836.

Almost surely, 2^226158278391 is an apocalyptic number.

226158278391 is a deficient number, since it is larger than the sum of its proper divisors (111683100561).

226158278391 is an equidigital number, since it uses as much as digits as its factorization.

226158278391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792077523 (or 2792077514 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 226158278391 in words is "two hundred twenty-six billion, one hundred fifty-eight million, two hundred seventy-eight thousand, three hundred ninety-one".