25665850456 has 16 divisors (see below), whose sum is σ = 48227865840. Its totient is φ = 12805086240.

The previous prime is 25665850439. The next prime is 25665850459. The reversal of 25665850456 is 65405856652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25665850459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475956 + ... + 3483331.

It is an arithmetic number, because the mean of its divisors is an integer number (3014241615).

Almost surely, 2^25665850456 is an apocalyptic number.

It is an amenable number.

25665850456 is a deficient number, since it is larger than the sum of its proper divisors (22562015384).

25665850456 is a wasteful number, since it uses less digits than its factorization.

25665850456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6959754 (or 6959750 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 52.

The spelling of 25665850456 in words is "twenty-five billion, six hundred sixty-five million, eight hundred fifty thousand, four hundred fifty-six".