25518762452 has 24 divisors (see below), whose sum is σ = 46011709800. Its totient is φ = 12377970176.

The previous prime is 25518762439. The next prime is 25518762461. The reversal of 25518762452 is 25426781552.

It can be written as a sum of positive squares in 4 ways, for example, as 9653848516 + 15864913936 = 98254^2 + 125956^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25518762397 and 25518762406.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 657377 + ... + 695112.

It is an arithmetic number, because the mean of its divisors is an integer number (1917154575).

Almost surely, 2^25518762452 is an apocalyptic number.

It is an amenable number.

25518762452 is a deficient number, since it is larger than the sum of its proper divisors (20492947348).

25518762452 is a wasteful number, since it uses less digits than its factorization.

25518762452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352635 (or 1352633 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 47.

The spelling of 25518762452 in words is "twenty-five billion, five hundred eighteen million, seven hundred sixty-two thousand, four hundred fifty-two".