25685867790 has 48 divisors (see below), whose sum is σ = 72854464176. Its totient is φ = 6226876800.

The previous prime is 25685867789. The next prime is 25685867797. The reversal of 25685867790 is 9776858652.

25685867790 is a `hidden beast` number, since 2 + 568 + 5 + 8 + 67 + 7 + 9 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25685867797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12971671 + ... + 12973650.

It is an arithmetic number, because the mean of its divisors is an integer number (1517801337).

Almost surely, 2^25685867790 is an apocalyptic number.

25685867790 is an abundant number, since it is smaller than the sum of its proper divisors (47168596386).

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

25685867790 is a wasteful number, since it uses less digits than its factorization.

25685867790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25945345 (or 25945342 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 63.

The spelling of 25685867790 in words is "twenty-five billion, six hundred eighty-five million, eight hundred sixty-seven thousand, seven hundred ninety".