25555527775 has 24 divisors (see below), whose sum is σ = 32089446144. Its totient is φ = 20186268000.

The previous prime is 25555527761. The next prime is 25555527787. The reversal of 25555527775 is 57772555552.

It is a de Polignac number, because none of the positive numbers 2^k-25555527775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5739300 + ... + 5743750.

It is an arithmetic number, because the mean of its divisors is an integer number (1337060256).

Almost surely, 2^25555527775 is an apocalyptic number.

25555527775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25555527775 is a deficient number, since it is larger than the sum of its proper divisors (6533918369).

25555527775 is a wasteful number, since it uses less digits than its factorization.

25555527775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311 (or 7306 counting only the distinct ones).

The product of its digits is 21437500, while the sum is 55.

The spelling of 25555527775 in words is "twenty-five billion, five hundred fifty-five million, five hundred twenty-seven thousand, seven hundred seventy-five".