25443634452 has 48 divisors (see below), whose sum is σ = 61193448960. Its totient is φ = 8222159232.

The previous prime is 25443634439. The next prime is 25443634453.

It is a happy number.

25443634452 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25443634453) 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 15 ways as a sum of consecutive naturals, for example, 19549 + ... + 226427.

It is an arithmetic number, because the mean of its divisors is an integer number (1274863520).

Almost surely, 2^25443634452 is an apocalyptic number.

It is an amenable number.

25443634452 is an abundant number, since it is smaller than the sum of its proper divisors (35749814508).

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

25443634452 is a wasteful number, since it uses less digits than its factorization.

25443634452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207200 (or 207198 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 42.

The spelling of 25443634452 in words is "twenty-five billion, four hundred forty-three million, six hundred thirty-four thousand, four hundred fifty-two".