25857224387256 has 32 divisors (see below), whose sum is σ = 67453628837760. Its totient is φ = 8244332413152.

The previous prime is 25857224387237. The next prime is 25857224387273. The reversal of 25857224387256 is 65278342275852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23421398350 + ... + 23421399453.

It is an arithmetic number, because the mean of its divisors is an integer number (2107925901180).

Almost surely, 2^{25857224387256} is an apocalyptic number.

It is an amenable number.

25857224387256 is an abundant number, since it is smaller than the sum of its proper divisors (41596404450504).

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

25857224387256 is a wasteful number, since it uses less digits than its factorization.

25857224387256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46842797835 (or 46842797831 counting only the distinct ones).

The product of its digits is 451584000, while the sum is 66.

The spelling of 25857224387256 in words is "twenty-five trillion, eight hundred fifty-seven billion, two hundred twenty-four million, three hundred eighty-seven thousand, two hundred fifty-six".