25857755555 has 4 divisors (see below), whose sum is σ = 31029306672. Its totient is φ = 20686204440.

The previous prime is 25857755551. The next prime is 25857755591. The reversal of 25857755555 is 55555775852.

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

It is not a de Polignac number, because 25857755555 - 2² = 25857755551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25857755494 and 25857755503.

It is not an unprimeable number, because it can be changed into a prime (25857755551) 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, 2585775551 + ... + 2585775560.

It is an arithmetic number, because the mean of its divisors is an integer number (7757326668).

Almost surely, 2^25857755555 is an apocalyptic number.

25857755555 is a deficient number, since it is larger than the sum of its proper divisors (5171551117).

25857755555 is an equidigital number, since it uses as much as digits as its factorization.

25857755555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5171551116.

The product of its digits is 61250000, while the sum is 59.

The spelling of 25857755555 in words is "twenty-five billion, eight hundred fifty-seven million, seven hundred fifty-five thousand, five hundred fifty-five".