25544320655 has 48 divisors (see below), whose sum is σ = 35962739904. Its totient is φ = 17058263040.

The previous prime is 25544320631. The next prime is 25544320657. The reversal of 25544320655 is 55602344552.

It is not a de Polignac number, because 25544320655 - 2¹⁰ = 25544319631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25544320657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27261347 + ... + 27262283.

It is an arithmetic number, because the mean of its divisors is an integer number (749223748).

Almost surely, 2^25544320655 is an apocalyptic number.

25544320655 is a deficient number, since it is larger than the sum of its proper divisors (10418419249).

25544320655 is an equidigital number, since it uses as much as digits as its factorization.

25544320655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 25544320655 in words is "twenty-five billion, five hundred forty-four million, three hundred twenty thousand, six hundred fifty-five".