25552778025 has 12 divisors (see below), whose sum is σ = 42247259792. Its totient is φ = 13628148240.

The previous prime is 25552778003. The next prime is 25552778071. The reversal of 25552778025 is 52087725552.

It is not a de Polignac number, because 25552778025 - 2⁷ = 25552777897 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 170351779 + ... + 170351928.

Almost surely, 2^25552778025 is an apocalyptic number.

25552778025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25552778025 is a deficient number, since it is larger than the sum of its proper divisors (16694481767).

25552778025 is a wasteful number, since it uses less digits than its factorization.

25552778025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340703720 (or 340703715 counting only the distinct ones).

The product of its (nonzero) digits is 1960000, while the sum is 48.

The spelling of 25552778025 in words is "twenty-five billion, five hundred fifty-two million, seven hundred seventy-eight thousand, twenty-five".