25505505305 has 8 divisors (see below), whose sum is σ = 34978978752. Its totient is φ = 17489489328.

The previous prime is 25505505293. The next prime is 25505505329. The reversal of 25505505305 is 50350550552.

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 25505505305 - 2¹⁶ = 25505439769 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: 728728723 = 25505505305 / (2 + 5 + 5 + 0 + 5 + 5 + 0 + 5 + 3 + 0 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364364327 + ... + 364364396.

It is an arithmetic number, because the mean of its divisors is an integer number (4372372344).

Almost surely, 2^25505505305 is an apocalyptic number.

It is an amenable number.

25505505305 is a deficient number, since it is larger than the sum of its proper divisors (9473473447).

25505505305 is an equidigital number, since it uses as much as digits as its factorization.

25505505305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728728735.

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

The spelling of 25505505305 in words is "twenty-five billion, five hundred five million, five hundred five thousand, three hundred five".