2500025002778 has 12 divisors (see below), whose sum is σ = 3795763051338. Its totient is φ = 1234952103000.

The previous prime is 2500025002759. The next prime is 2500025002801. The reversal of 2500025002778 is 8772005200052.

It can be written as a sum of positive squares in only one way, i.e., 2352919769929 + 147105232849 = 1533923^2 + 383543^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 90711473 + ... + 90739028.

Almost surely, 2^{2500025002778} is an apocalyptic number.

2500025002778 is a deficient number, since it is larger than the sum of its proper divisors (1295738048560).

2500025002778 is an equidigital number, since it uses as much as digits as its factorization.

2500025002778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181450669 (or 181450586 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The spelling of 2500025002778 in words is "two trillion, five hundred billion, twenty-five million, two thousand, seven hundred seventy-eight".