25555002502778 has 24 divisors (see below), whose sum is σ = 44595720648000. Its totient is φ = 10950952963608.

The previous prime is 25555002502759. The next prime is 25555002502859. The reversal of 25555002502778 is 87720520055552.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13272068 + ... + 15075071.

It is an arithmetic number, because the mean of its divisors is an integer number (1858155027000).

Almost surely, 2^{25555002502778} is an apocalyptic number.

25555002502778 is a deficient number, since it is larger than the sum of its proper divisors (19040718145222).

25555002502778 is a wasteful number, since it uses less digits than its factorization.

25555002502778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28356354 (or 28356347 counting only the distinct ones).

The product of its (nonzero) digits is 9800000, while the sum is 53.

The spelling of 25555002502778 in words is "twenty-five trillion, five hundred fifty-five billion, two million, five hundred two thousand, seven hundred seventy-eight".