25166420432 has 20 divisors (see below), whose sum is σ = 48832412100. Its totient is φ = 12564507648.

The previous prime is 25166420431. The next prime is 25166420443. The reversal of 25166420432 is 23402466152.

It can be written as a sum of positive squares in 2 ways, for example, as 5131716496 + 20034703936 = 71636^2 + 141544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25166420392 and 25166420401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25166420431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157807 + ... + 1179342.

It is an arithmetic number, because the mean of its divisors is an integer number (2441620605).

Almost surely, 2^25166420432 is an apocalyptic number.

It is an amenable number.

25166420432 is a deficient number, since it is larger than the sum of its proper divisors (23665991668).

25166420432 is a wasteful number, since it uses less digits than its factorization.

25166420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337830 (or 2337824 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 25166420432 its reverse (23402466152), we get a palindrome (48568886584).

The spelling of 25166420432 in words is "twenty-five billion, one hundred sixty-six million, four hundred twenty thousand, four hundred thirty-two".