25125421144 has 16 divisors (see below), whose sum is σ = 47399186520. Its totient is φ = 12485638080.

The previous prime is 25125421121. The next prime is 25125421183. The reversal of 25125421144 is 44112452152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9632677 + ... + 9635284.

Almost surely, 2^25125421144 is an apocalyptic number.

It is an amenable number.

25125421144 is a deficient number, since it is larger than the sum of its proper divisors (22273765376).

25125421144 is a wasteful number, since it uses less digits than its factorization.

25125421144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19268130 (or 19268126 counting only the distinct ones).

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

Adding to 25125421144 its reverse (44112452152), we get a palindrome (69237873296).

The spelling of 25125421144 in words is "twenty-five billion, one hundred twenty-five million, four hundred twenty-one thousand, one hundred forty-four".