2563510262778 has 24 divisors (see below), whose sum is σ = 5554362996468. Its totient is φ = 854489457792.

The previous prime is 2563510262743. The next prime is 2563510262813. The reversal of 2563510262778 is 8772620153652.

2563510262778 is a `hidden beast` number, since 2 + 5 + 6 + 3 + 5 + 1 + 0 + 2 + 627 + 7 + 8 = 666.

2563510262778 is a nontrivial binomial coefficient, being equal to C(2264293, 2).

It is an interprime number because it is at equal distance from previous prime (2563510262743) and next prime (2563510262813).

It can be written as a sum of positive squares in 2 ways, for example, as 2539360170369 + 24150092409 = 1593537^2 + 155403^2 .

It is a super-2 number, since 2×2563510262778² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1 + ... + 2264292.

Almost surely, 2^{2563510262778} is an apocalyptic number.

2563510262778 is the 2264292-nd triangular number.

2563510262778 is an abundant number, since it is smaller than the sum of its proper divisors (2990852733690).

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

2563510262778 is a wasteful number, since it uses less digits than its factorization.

2563510262778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327198 (or 2327195 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 2563510262778 in words is "two trillion, five hundred sixty-three billion, five hundred ten million, two hundred sixty-two thousand, seven hundred seventy-eight".