2505902578 has 32 divisors (see below), whose sum is σ = 4177236096. Its totient is φ = 1121395968.

The previous prime is 2505902573. The next prime is 2505902603. The reversal of 2505902578 is 8752095052.

2505902578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2505902573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126025 + ... + 144547.

It is an arithmetic number, because the mean of its divisors is an integer number (130538628).

Almost surely, 2^2505902578 is an apocalyptic number.

2505902578 is a deficient number, since it is larger than the sum of its proper divisors (1671333518).

2505902578 is a wasteful number, since it uses less digits than its factorization.

2505902578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18738.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 2505902578 is about 50058.9909806420. The cubic root of 2505902578 is about 1358.2761062102.

The spelling of 2505902578 in words is "two billion, five hundred five million, nine hundred two thousand, five hundred seventy-eight".