25142052145 has 24 divisors (see below), whose sum is σ = 35331849000. Its totient is φ = 17124532992.

The previous prime is 25142052139. The next prime is 25142052167. The reversal of 25142052145 is 54125024152.

It can be written as a sum of positive squares in 4 ways, for example, as 362255089 + 24779797056 = 19033^2 + 157416^2 .

It is not a de Polignac number, because 25142052145 - 2³ = 25142052137 is a prime.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 307860 + ... + 380869.

It is an arithmetic number, because the mean of its divisors is an integer number (1472160375).

Almost surely, 2^25142052145 is an apocalyptic number.

It is an amenable number.

25142052145 is a deficient number, since it is larger than the sum of its proper divisors (10189796855).

25142052145 is a wasteful number, since it uses less digits than its factorization.

25142052145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688897 (or 688890 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 25142052145 its reverse (54125024152), we get a palindrome (79267076297).

The spelling of 25142052145 in words is "twenty-five billion, one hundred forty-two million, fifty-two thousand, one hundred forty-five".