2506402278 has 40 divisors (see below), whose sum is σ = 5631634272. Its totient is φ = 833171184.

The previous prime is 2506402243. The next prime is 2506402331. The reversal of 2506402278 is 8722046052.

2506402278 is a `hidden beast` number, since 2 + 5 + 0 + 640 + 2 + 2 + 7 + 8 = 666.

2506402278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38376 + ... + 80532.

Almost surely, 2^2506402278 is an apocalyptic number.

2506402278 is an abundant number, since it is smaller than the sum of its proper divisors (3125231994).

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

2506402278 is a wasteful number, since it uses less digits than its factorization.

2506402278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42538 (or 42529 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 2506402278 is about 50063.9818432374. The cubic root of 2506402278 is about 1358.3663844551.

The spelling of 2506402278 in words is "two billion, five hundred six million, four hundred two thousand, two hundred seventy-eight".