25555505303 has 4 divisors (see below), whose sum is σ = 25595374128. Its totient is φ = 25515636480.

The previous prime is 25555505237. The next prime is 25555505317. The reversal of 25555505303 is 30350555552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25555505303 - 2⁸ = 25555505047 is a prime.

It is a super-2 number, since 2×25555505303² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555505363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19933451 + ... + 19934732.

It is an arithmetic number, because the mean of its divisors is an integer number (6398843532).

Almost surely, 2^25555505303 is an apocalyptic number.

25555505303 is a deficient number, since it is larger than the sum of its proper divisors (39868825).

25555505303 is an equidigital number, since it uses as much as digits as its factorization.

25555505303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39868824.

The product of its (nonzero) digits is 281250, while the sum is 38.

The spelling of 25555505303 in words is "twenty-five billion, five hundred fifty-five million, five hundred five thousand, three hundred three".