25115335442 has 6 divisors (see below), whose sum is σ = 37673339349. Its totient is φ = 12557555660.

The previous prime is 25115335423. The next prime is 25115335477. The reversal of 25115335442 is 24453351152.

It can be written as a sum of positive squares in 2 ways, for example, as 19645105921 + 5470229521 = 140161^2 + 73961^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=112061.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 168092 + ... + 280152.

Almost surely, 2^25115335442 is an apocalyptic number.

25115335442 is a deficient number, since it is larger than the sum of its proper divisors (12558003907).

25115335442 is an frugal number, since it uses more digits than its factorization.

25115335442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224124 (or 112063 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

Adding to 25115335442 its reverse (24453351152), we get a palindrome (49568686594).

The spelling of 25115335442 in words is "twenty-five billion, one hundred fifteen million, three hundred thirty-five thousand, four hundred forty-two".