25130809729 has 3 divisors (see below), whose sum is σ = 25130968257. Its totient is φ = 25130651202.

The previous prime is 25130809721. The next prime is 25130809747. The reversal of 25130809729 is 92790803152.

The square root of 25130809729 is 158527.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25130809729 - 2³ = 25130809721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25130809721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79264 + ... + 237790.

It is an arithmetic number, because the mean of its divisors is an integer number (8376989419).

Almost surely, 2^25130809729 is an apocalyptic number.

25130809729 is the 158527-th square number.

25130809729 is the 79264-th centered octagonal number.

It is an amenable number.

25130809729 is a deficient number, since it is larger than the sum of its proper divisors (158528).

25130809729 is an frugal number, since it uses more digits than its factorization.

25130809729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317054 (or 158527 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 25130809729 in words is "twenty-five billion, one hundred thirty million, eight hundred nine thousand, seven hundred twenty-nine".