25115144422 has 4 divisors (see below), whose sum is σ = 37672716636. Its totient is φ = 12557572210.

The previous prime is 25115144393. The next prime is 25115144489. The reversal of 25115144422 is 22444151152.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6278786104 + ... + 6278786107.

It is an arithmetic number, because the mean of its divisors is an integer number (9418179159).

Almost surely, 2^25115144422 is an apocalyptic number.

25115144422 is a deficient number, since it is larger than the sum of its proper divisors (12557572214).

25115144422 is a wasteful number, since it uses less digits than its factorization.

25115144422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12557572213.

The product of its digits is 12800, while the sum is 31.

Adding to 25115144422 its reverse (22444151152), we get a palindrome (47559295574).

The spelling of 25115144422 in words is "twenty-five billion, one hundred fifteen million, one hundred forty-four thousand, four hundred twenty-two".