2506588778 has 4 divisors (see below), whose sum is σ = 3759883170. Its totient is φ = 1253294388.

The previous prime is 2506588769. The next prime is 2506588841. The reversal of 2506588778 is 8778856052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2404235089 + 102353689 = 49033^2 + 10117^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626647193 + ... + 626647196.

Almost surely, 2^2506588778 is an apocalyptic number.

2506588778 is a deficient number, since it is larger than the sum of its proper divisors (1253294392).

2506588778 is a wasteful number, since it uses less digits than its factorization.

2506588778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253294391.

The product of its (nonzero) digits is 7526400, while the sum is 56.

The square root of 2506588778 is about 50065.8444251168. The cubic root of 2506588778 is about 1358.4000753820.

The spelling of 2506588778 in words is "two billion, five hundred six million, five hundred eighty-eight thousand, seven hundred seventy-eight".