25529140653769 has 3 divisors (see below), whose sum is σ = 25529145706407. Its totient is φ = 25529135601132.

The previous prime is 25529140653767. The next prime is 25529140653827. The reversal of 25529140653769 is 96735604192552.

It is a happy number.

The square root of 25529140653769 is 5052637.

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 can be written as a sum of positive squares in only one way, i.e., 248477325625 + 25280663328144 = 498475^2 + 5027988^2 .

It is not a de Polignac number, because 25529140653769 - 2¹ = 25529140653767 is a prime.

It is a super-2 number, since 2×25529140653769² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25529140653769.

It is not an unprimeable number, because it can be changed into a prime (25529140653767) 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, 2526319 + ... + 7578955.

It is an arithmetic number, because the mean of its divisors is an integer number (8509715235469).

Almost surely, 2^{25529140653769} is an apocalyptic number.

25529140653769 is the 5052637-th square number.

25529140653769 is the 2526319-th centered octagonal number.

It is an amenable number.

25529140653769 is a deficient number, since it is larger than the sum of its proper divisors (5052638).

25529140653769 is an frugal number, since it uses more digits than its factorization.

25529140653769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105274 (or 5052637 counting only the distinct ones).

The product of its (nonzero) digits is 122472000, while the sum is 64.

The spelling of 25529140653769 in words is "twenty-five trillion, five hundred twenty-nine billion, one hundred forty million, six hundred fifty-three thousand, seven hundred sixty-nine".