25256243511 has 12 divisors (see below), whose sum is σ = 38627196192. Its totient is φ = 15847054656.

The previous prime is 25256243503. The next prime is 25256243539. The reversal of 25256243511 is 11534265252.

25256243511 is a `hidden beast` number, since 2 + 5 + 2 + 562 + 43 + 51 + 1 = 666.

It is not a de Polignac number, because 25256243511 - 2³ = 25256243503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25256233511) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 82536591 + ... + 82536896.

It is an arithmetic number, because the mean of its divisors is an integer number (3218933016).

Almost surely, 2^25256243511 is an apocalyptic number.

25256243511 is a deficient number, since it is larger than the sum of its proper divisors (13370952681).

25256243511 is a wasteful number, since it uses less digits than its factorization.

25256243511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165073510 (or 165073507 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 25256243511 in words is "twenty-five billion, two hundred fifty-six million, two hundred forty-three thousand, five hundred eleven".