2506661235 has 120 divisors (see below), whose sum is σ = 4964637744. Its totient is φ = 1209012480.

The previous prime is 2506661173. The next prime is 2506661243. The reversal of 2506661235 is 5321666052.

It is a happy number.

It is not a de Polignac number, because 2506661235 - 2⁸ = 2506660979 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2506661235.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3627240 + ... + 3627930.

Almost surely, 2^2506661235 is an apocalyptic number.

2506661235 is a deficient number, since it is larger than the sum of its proper divisors (2457976509).

2506661235 is a wasteful number, since it uses less digits than its factorization.

2506661235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 2506661235 is about 50066.5680369645. The cubic root of 2506661235 is about 1358.4131641725.

The spelling of 2506661235 in words is "two billion, five hundred six million, six hundred sixty-one thousand, two hundred thirty-five".