25505673256 has 48 divisors (see below), whose sum is σ = 56924778240. Its totient is φ = 10676786400.

The previous prime is 25505673247. The next prime is 25505673269. The reversal of 25505673256 is 65237650552.

It is a super-3 number, since 3×25505673256³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 739720 + ... + 773431.

It is an arithmetic number, because the mean of its divisors is an integer number (1185932880).

Almost surely, 2^25505673256 is an apocalyptic number.

It is an amenable number.

25505673256 is an abundant number, since it is smaller than the sum of its proper divisors (31419104984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25505673256 is a wasteful number, since it uses less digits than its factorization.

25505673256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513214 (or 1513203 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 46.

The spelling of 25505673256 in words is "twenty-five billion, five hundred five million, six hundred seventy-three thousand, two hundred fifty-six".