25555025049 has 16 divisors (see below), whose sum is σ = 34305638400. Its totient is φ = 16920922256.

The previous prime is 25555025033. The next prime is 25555025063. The reversal of 25555025049 is 94052055552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25555025049 - 2⁴ = 25555025033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25555025049.

It is not an unprimeable number, because it can be changed into a prime (25555025009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228082 + ... + 321140.

It is an arithmetic number, because the mean of its divisors is an integer number (2144102400).

Almost surely, 2^25555025049 is an apocalyptic number.

It is an amenable number.

25555025049 is a deficient number, since it is larger than the sum of its proper divisors (8750613351).

25555025049 is a wasteful number, since it uses less digits than its factorization.

25555025049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93684.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 25555025049 in words is "twenty-five billion, five hundred fifty-five million, twenty-five thousand, forty-nine".