25123121264 has 20 divisors (see below), whose sum is σ = 49262508456. Its totient is φ = 12410215872.

The previous prime is 25123121207. The next prime is 25123121269. The reversal of 25123121264 is 46212132152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25123121269) 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 3 ways as a sum of consecutive naturals, for example, 9457679 + ... + 9460334.

Almost surely, 2^25123121264 is an apocalyptic number.

It is an amenable number.

25123121264 is a deficient number, since it is larger than the sum of its proper divisors (24139387192).

25123121264 is a wasteful number, since it uses less digits than its factorization.

25123121264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18918104 (or 18918098 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The spelling of 25123121264 in words is "twenty-five billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred sixty-four".