25315315155 has 40 divisors (see below), whose sum is σ = 48870829392. Its totient is φ = 12462921792.

The previous prime is 25315315121. The next prime is 25315315163. The reversal of 25315315155 is 55151351352.

25315315155 is a `hidden beast` number, since 25 + 3 + 1 + 531 + 51 + 55 = 666.

It is not a de Polignac number, because 25315315155 - 2⁷ = 25315315027 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2398849 + ... + 2409378.

Almost surely, 2^25315315155 is an apocalyptic number.

25315315155 is a deficient number, since it is larger than the sum of its proper divisors (23555514237).

25315315155 is a wasteful number, since it uses less digits than its factorization.

25315315155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4808257 (or 4808248 counting only the distinct ones).

The product of its digits is 56250, while the sum is 36.

The spelling of 25315315155 in words is "twenty-five billion, three hundred fifteen million, three hundred fifteen thousand, one hundred fifty-five".