2500002778 has 32 divisors (see below), whose sum is σ = 4619591424. Its totient is φ = 988111872.

The previous prime is 2500002761. The next prime is 2500002787. The reversal of 2500002778 is 8772000052.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215851 + ... + 227137.

It is an arithmetic number, because the mean of its divisors is an integer number (144362232).

Almost surely, 2^2500002778 is an apocalyptic number.

2500002778 is a deficient number, since it is larger than the sum of its proper divisors (2119588646).

2500002778 is a wasteful number, since it uses less digits than its factorization.

2500002778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12526.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2500002778 is about 50000.0277799923. The cubic root of 2500002778 is about 1357.2093110074.

The spelling of 2500002778 in words is "two billion, five hundred million, two thousand, seven hundred seventy-eight".