25304157442 has 4 divisors (see below), whose sum is σ = 37956236166. Its totient is φ = 12652078720.

The previous prime is 25304157413. The next prime is 25304157443. The reversal of 25304157442 is 24475140352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25198705081 + 105452361 = 158741^2 + 10269^2 .

It is not an unprimeable number, because it can be changed into a prime (25304157443) 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 as a sum of consecutive naturals, namely, 6326039359 + ... + 6326039362.

Almost surely, 2^25304157442 is an apocalyptic number.

25304157442 is a deficient number, since it is larger than the sum of its proper divisors (12652078724).

25304157442 is a wasteful number, since it uses less digits than its factorization.

25304157442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12652078723.

The product of its (nonzero) digits is 134400, while the sum is 37.

Adding to 25304157442 its reverse (24475140352), we get a palindrome (49779297794).

The spelling of 25304157442 in words is "twenty-five billion, three hundred four million, one hundred fifty-seven thousand, four hundred forty-two".