2257226726778 has 24 divisors (see below), whose sum is σ = 4890687808500. Its totient is φ = 752404308864.

The previous prime is 2257226726771. The next prime is 2257226726779. The reversal of 2257226726778 is 8776276227522.

2257226726778 is a `hidden beast` number, since 225 + 7 + 22 + 67 + 267 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1545165844209 + 712060882569 = 1243047^2 + 843837^2 .

It is a super-2 number, since 2×2257226726778² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2257226726771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3992818 + ... + 4522946.

Almost surely, 2^{2257226726778} is an apocalyptic number.

2257226726778 is an abundant number, since it is smaller than the sum of its proper divisors (2633461081722).

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

2257226726778 is a wasteful number, since it uses less digits than its factorization.

2257226726778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766686 (or 766683 counting only the distinct ones).

The product of its digits is 110638080, while the sum is 63.

The spelling of 2257226726778 in words is "two trillion, two hundred fifty-seven billion, two hundred twenty-six million, seven hundred twenty-six thousand, seven hundred seventy-eight".