25555505055 has 16 divisors (see below), whose sum is σ = 41310344544. Its totient is φ = 13489090560.

The previous prime is 25555505047. The next prime is 25555505081. The reversal of 25555505055 is 55050555552.

It is not a de Polignac number, because 25555505055 - 2³ = 25555505047 is a prime.

It is a super-2 number, since 2×25555505055² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25555504998 and 25555505016.

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, 8780506 + ... + 8783415.

It is an arithmetic number, because the mean of its divisors is an integer number (2581896534).

Almost surely, 2^25555505055 is an apocalyptic number.

25555505055 is a deficient number, since it is larger than the sum of its proper divisors (15754839489).

25555505055 is a wasteful number, since it uses less digits than its factorization.

25555505055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17564026.

The product of its (nonzero) digits is 781250, while the sum is 42.

The spelling of 25555505055 in words is "twenty-five billion, five hundred fifty-five million, five hundred five thousand, fifty-five".