25511261255 has 8 divisors (see below), whose sum is σ = 30616164432. Its totient is φ = 20407241728.

The previous prime is 25511261249. The next prime is 25511261261. The reversal of 25511261255 is 55216211552.

It is an interprime number because it is at equal distance from previous prime (25511261249) and next prime (25511261261).

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 25511261255 - 2³⁴ = 8331392071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 155642 + ... + 274311.

It is an arithmetic number, because the mean of its divisors is an integer number (3827020554).

Almost surely, 2^25511261255 is an apocalyptic number.

25511261255 is a deficient number, since it is larger than the sum of its proper divisors (5104903177).

25511261255 is a wasteful number, since it uses less digits than its factorization.

25511261255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441825.

The product of its digits is 30000, while the sum is 35.

The spelling of 25511261255 in words is "twenty-five billion, five hundred eleven million, two hundred sixty-one thousand, two hundred fifty-five".