2500000002778 has 16 divisors (see below), whose sum is σ = 3784500720000. Its totient is φ = 1238500351152.

The previous prime is 2500000002757. The next prime is 2500000002779. The reversal of 2500000002778 is 8772000000052.

It is not an unprimeable number, because it can be changed into a prime (2500000002779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9964923 + ... + 10212721.

It is an arithmetic number, because the mean of its divisors is an integer number (236531295000).

Almost surely, 2^{2500000002778} is an apocalyptic number.

2500000002778 is a deficient number, since it is larger than the sum of its proper divisors (1284500717222).

2500000002778 is a wasteful number, since it uses less digits than its factorization.

2500000002778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294189.

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

The spelling of 2500000002778 in words is "two trillion, five hundred billion, two thousand, seven hundred seventy-eight".