25121442512 has 10 divisors (see below), whose sum is σ = 48672794898. Its totient is φ = 12560721248.

The previous prime is 25121442461. The next prime is 25121442523. The reversal of 25121442512 is 21524412152.

It can be written as a sum of positive squares in only one way, i.e., 21472799296 + 3648643216 = 146536^2 + 60404^2 .

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, 785045063 + ... + 785045094.

Almost surely, 2^25121442512 is an apocalyptic number.

It is an amenable number.

25121442512 is a deficient number, since it is larger than the sum of its proper divisors (23551352386).

25121442512 is a wasteful number, since it uses less digits than its factorization.

25121442512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570090165 (or 1570090159 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

Adding to 25121442512 its reverse (21524412152), we get a palindrome (46645854664).

The spelling of 25121442512 in words is "twenty-five billion, one hundred twenty-one million, four hundred forty-two thousand, five hundred twelve".