25505555252553 has 32 divisors (see below), whose sum is σ = 37845477264000. Its totient is φ = 16976947111488.

The previous prime is 25505555252477. The next prime is 25505555252561. The reversal of 25505555252553 is 35525255550552.

It is not a de Polignac number, because 25505555252553 - 2⁹ = 25505555252041 is a prime.

It is a super-2 number, since 2×25505555252553² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25505555252553.

It is not an unprimeable number, because it can be changed into a prime (25505555252563) 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 31 ways as a sum of consecutive naturals, for example, 206472675 + ... + 206596167.

It is an arithmetic number, because the mean of its divisors is an integer number (1182671164500).

Almost surely, 2^{25505555252553} is an apocalyptic number.

It is an amenable number.

25505555252553 is a deficient number, since it is larger than the sum of its proper divisors (12339922011447).

25505555252553 is a wasteful number, since it uses less digits than its factorization.

25505555252553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135478 (or 135472 counting only the distinct ones).

The product of its (nonzero) digits is 46875000, while the sum is 54.

The spelling of 25505555252553 in words is "twenty-five trillion, five hundred five billion, five hundred fifty-five million, two hundred fifty-two thousand, five hundred fifty-three".