25305505505 has 8 divisors (see below), whose sum is σ = 34704693312. Its totient is φ = 17352346608.

The previous prime is 25305505501. The next prime is 25305505529. The reversal of 25305505505 is 50550550352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25305505505 - 2² = 25305505501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 723014443 = 25305505505 / (2 + 5 + 3 + 0 + 5 + 5 + 0 + 5 + 5 + 0 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25305505501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361507187 + ... + 361507256.

It is an arithmetic number, because the mean of its divisors is an integer number (4338086664).

Almost surely, 2^25305505505 is an apocalyptic number.

It is an amenable number.

25305505505 is a deficient number, since it is larger than the sum of its proper divisors (9399187807).

25305505505 is an equidigital number, since it uses as much as digits as its factorization.

25305505505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723014455.

The product of its (nonzero) digits is 93750, while the sum is 35.

The spelling of 25305505505 in words is "twenty-five billion, three hundred five million, five hundred five thousand, five hundred five".