25382543761 has 3 divisors (see below), whose sum is σ = 25382703081. Its totient is φ = 25382384442.

The previous prime is 25382543759. The next prime is 25382543833. The reversal of 25382543761 is 16734528352.

The square root of 25382543761 is 159319.

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 25382543761 - 2¹ = 25382543759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25382543561) 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, 79660 + ... + 238978.

It is an arithmetic number, because the mean of its divisors is an integer number (8460901027).

Almost surely, 2^25382543761 is an apocalyptic number.

25382543761 is the 159319-th square number.

25382543761 is the 79660-th centered octagonal number.

It is an amenable number.

25382543761 is a deficient number, since it is larger than the sum of its proper divisors (159320).

25382543761 is an frugal number, since it uses more digits than its factorization.

25382543761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318638 (or 159319 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 25382543761 in words is "twenty-five billion, three hundred eighty-two million, five hundred forty-three thousand, seven hundred sixty-one".