25340145641 has 4 divisors (see below), whose sum is σ = 25340744532. Its totient is φ = 25339546752.

The previous prime is 25340145613. The next prime is 25340145661. The reversal of 25340145641 is 14654104352.

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 24217895641 + 1122250000 = 155621^2 + 33500^2 .

It is a cyclic number.

It is not a de Polignac number, because 25340145641 - 2⁶ = 25340145577 is a prime.

It is a super-2 number, since 2×25340145641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25340145601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230720 + ... + 322353.

It is an arithmetic number, because the mean of its divisors is an integer number (6335186133).

Almost surely, 2^25340145641 is an apocalyptic number.

It is an amenable number.

25340145641 is a deficient number, since it is larger than the sum of its proper divisors (598891).

25340145641 is an equidigital number, since it uses as much as digits as its factorization.

25340145641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598890.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 25340145641 its reverse (14654104352), we get a palindrome (39994249993).

The spelling of 25340145641 in words is "twenty-five billion, three hundred forty million, one hundred forty-five thousand, six hundred forty-one".