25243489924 has 27 divisors (see below), whose sum is σ = 46937604847. Its totient is φ = 11876747264.

The previous prime is 25243489903. The next prime is 25243489933. The reversal of 25243489924 is 42998434252.

It is a happy number.

The square root of 25243489924 is 158882.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14888392324 + 10355097600 = 122018^2 + 101760^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5399652 + ... + 5404324.

Almost surely, 2^25243489924 is an apocalyptic number.

25243489924 is the 158882-nd square number.

It is an amenable number.

25243489924 is a deficient number, since it is larger than the sum of its proper divisors (21694114923).

25243489924 is an frugal number, since it uses more digits than its factorization.

25243489924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384 (or 4692 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 52.

The spelling of 25243489924 in words is "twenty-five billion, two hundred forty-three million, four hundred eighty-nine thousand, nine hundred twenty-four".