25864021922 has 6 divisors (see below), whose sum is σ = 38796374043. Its totient is φ = 12931897242.

The previous prime is 25864021921. The next prime is 25864021943. The reversal of 25864021922 is 22912046852.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12932010961 + 12932010961 = 113719^2 + 113719^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113719.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25864021922.

It is not an unprimeable number, because it can be changed into a prime (25864021921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 170579 + ... + 284297.

Almost surely, 2^25864021922 is an apocalyptic number.

25864021922 is a deficient number, since it is larger than the sum of its proper divisors (12932352121).

25864021922 is an frugal number, since it uses more digits than its factorization.

25864021922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227440 (or 113721 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 25864021922 in words is "twenty-five billion, eight hundred sixty-four million, twenty-one thousand, nine hundred twenty-two".