25665850422 has 12 divisors (see below), whose sum is σ = 55609342620. Its totient is φ = 8555283468.

The previous prime is 25665850411. The next prime is 25665850423. The reversal of 25665850422 is 22405856652.

It is a happy number.

25665850422 is a `hidden beast` number, since 2 + 5 + 66 + 585 + 0 + 4 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25665850423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712940272 + ... + 712940307.

It is an arithmetic number, because the mean of its divisors is an integer number (4634111885).

Almost surely, 2^25665850422 is an apocalyptic number.

25665850422 is an abundant number, since it is smaller than the sum of its proper divisors (29943492198).

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

25665850422 is a wasteful number, since it uses less digits than its factorization.

25665850422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425880587 (or 1425880584 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The spelling of 25665850422 in words is "twenty-five billion, six hundred sixty-five million, eight hundred fifty thousand, four hundred twenty-two".