25537556855 has 16 divisors (see below), whose sum is σ = 31124062944. Its totient is φ = 20111139840.

The previous prime is 25537556839. The next prime is 25537556887. The reversal of 25537556855 is 55865573552.

It is not a de Polignac number, because 25537556855 - 2⁴ = 25537556839 is a prime.

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 25537556855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470399 + ... + 521871.

It is an arithmetic number, because the mean of its divisors is an integer number (1945253934).

Almost surely, 2^25537556855 is an apocalyptic number.

25537556855 is a deficient number, since it is larger than the sum of its proper divisors (5586506089).

25537556855 is a wasteful number, since it uses less digits than its factorization.

25537556855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53026.

The product of its digits is 31500000, while the sum is 56.

The spelling of 25537556855 in words is "twenty-five billion, five hundred thirty-seven million, five hundred fifty-six thousand, eight hundred fifty-five".