25164341644 has 12 divisors (see below), whose sum is σ = 47425105504. Its totient is φ = 11614311504.

The previous prime is 25164341623. The next prime is 25164341689. The reversal of 25164341644 is 44614346152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25164341597 and 25164341606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241964772 + ... + 241964875.

Almost surely, 2^25164341644 is an apocalyptic number.

It is an amenable number.

25164341644 is a deficient number, since it is larger than the sum of its proper divisors (22260763860).

25164341644 is a wasteful number, since it uses less digits than its factorization.

25164341644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483929664 (or 483929662 counting only the distinct ones).

The product of its digits is 276480, while the sum is 40.

Adding to 25164341644 its reverse (44614346152), we get a palindrome (69778687796).

The spelling of 25164341644 in words is "twenty-five billion, one hundred sixty-four million, three hundred forty-one thousand, six hundred forty-four".