25040999855 has 4 divisors (see below), whose sum is σ = 30049199832. Its totient is φ = 20032799880.

The previous prime is 25040999839. The next prime is 25040999887. The reversal of 25040999855 is 55899904052.

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

It is not a de Polignac number, because 25040999855 - 2⁴ = 25040999839 is a prime.

It is a super-3 number, since 3×25040999855³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25040999855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504099981 + ... + 2504099990.

It is an arithmetic number, because the mean of its divisors is an integer number (7512299958).

Almost surely, 2^25040999855 is an apocalyptic number.

25040999855 is a deficient number, since it is larger than the sum of its proper divisors (5008199977).

25040999855 is an equidigital number, since it uses as much as digits as its factorization.

25040999855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008199976.

The product of its (nonzero) digits is 5832000, while the sum is 56.

The spelling of 25040999855 in words is "twenty-five billion, forty million, nine hundred ninety-nine thousand, eight hundred fifty-five".