25112551493 has 4 divisors (see below), whose sum is σ = 25149866508. Its totient is φ = 25075236480.

The previous prime is 25112551489. The next prime is 25112551511. The reversal of 25112551493 is 39415521152.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12928144804 + 12184406689 = 113702^2 + 110383^2 .

It is a cyclic number.

It is not a de Polignac number, because 25112551493 - 2² = 25112551489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25112551433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18656498 + ... + 18657843.

It is an arithmetic number, because the mean of its divisors is an integer number (6287466627).

Almost surely, 2^25112551493 is an apocalyptic number.

It is an amenable number.

25112551493 is a deficient number, since it is larger than the sum of its proper divisors (37315015).

25112551493 is an equidigital number, since it uses as much as digits as its factorization.

25112551493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37315014.

The product of its digits is 54000, while the sum is 38.

The spelling of 25112551493 in words is "twenty-five billion, one hundred twelve million, five hundred fifty-one thousand, four hundred ninety-three".