25500002553 has 8 divisors (see below), whose sum is σ = 37777781600. Its totient is φ = 17000001684.

The previous prime is 25500002531. The next prime is 25500002579. The reversal of 25500002553 is 35520000552.

It is not a de Polignac number, because 25500002553 - 2¹⁰ = 25500001529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 944444539 = 25500002553 / (2 + 5 + 5 + 0 + 0 + 0 + 0 + 2 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25500002653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472222243 + ... + 472222296.

It is an arithmetic number, because the mean of its divisors is an integer number (4722222700).

Almost surely, 2^25500002553 is an apocalyptic number.

It is an amenable number.

25500002553 is a deficient number, since it is larger than the sum of its proper divisors (12277779047).

25500002553 is an equidigital number, since it uses as much as digits as its factorization.

25500002553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944444548 (or 944444542 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The spelling of 25500002553 in words is "twenty-five billion, five hundred million, two thousand, five hundred fifty-three".