25351963729 has 3 divisors (see below), whose sum is σ = 25352122953. Its totient is φ = 25351804506.

The previous prime is 25351963709. The next prime is 25351963781. The reversal of 25351963729 is 92736915352.

The square root of 25351963729 is 159223.

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 25351963729 - 2⁵ = 25351963697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25351963709) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 79612 + ... + 238834.

It is an arithmetic number, because the mean of its divisors is an integer number (8450707651).

Almost surely, 2^25351963729 is an apocalyptic number.

25351963729 is the 159223-rd square number.

25351963729 is the 79612-nd centered octagonal number.

It is an amenable number.

25351963729 is a deficient number, since it is larger than the sum of its proper divisors (159224).

25351963729 is an frugal number, since it uses more digits than its factorization.

25351963729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318446 (or 159223 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 52.

The spelling of 25351963729 in words is "twenty-five billion, three hundred fifty-one million, nine hundred sixty-three thousand, seven hundred twenty-nine".