25555545 has 48 divisors (see below), whose sum is σ = 46455552. Its totient is φ = 12983040.

The previous prime is 25555531. The next prime is 25555561. The reversal of 25555545 is 54555552.

It is not a de Polignac number, because 25555545 - 2⁴ = 25555529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90805 + ... + 91085.

It is an arithmetic number, because the mean of its divisors is an integer number (967824).

Almost surely, 2^25555545 is an apocalyptic number.

It is an amenable number.

25555545 is a deficient number, since it is larger than the sum of its proper divisors (20900007).

25555545 is a wasteful number, since it uses less digits than its factorization.

25555545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 379 counting only the distinct ones).

The product of its digits is 125000, while the sum is 36.

The square root of 25555545 is about 5055.2492520152. The cubic root of 25555545 is about 294.5518235259.

It can be divided in two parts, 2555 and 5545, that added together give a square (8100 = 90²).

The spelling of 25555545 in words is "twenty-five million, five hundred fifty-five thousand, five hundred forty-five".