25114475509 has 4 divisors (see below), whose sum is σ = 25153656300. Its totient is φ = 25075294720.

The previous prime is 25114475483. The next prime is 25114475539. The reversal of 25114475509 is 90557441152.

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 23987194884 + 1127280625 = 154878^2 + 33575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25114475509 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 (25114475539) 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, 19589434 + ... + 19590715.

It is an arithmetic number, because the mean of its divisors is an integer number (6288414075).

Almost surely, 2^25114475509 is an apocalyptic number.

It is an amenable number.

25114475509 is a deficient number, since it is larger than the sum of its proper divisors (39180791).

25114475509 is an equidigital number, since it uses as much as digits as its factorization.

25114475509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39180790.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 25114475509 in words is "twenty-five billion, one hundred fourteen million, four hundred seventy-five thousand, five hundred nine".