25668180720001 has 4 divisors (see below), whose sum is σ = 25681973403604. Its totient is φ = 25654388036400.

The previous prime is 25668180719963. The next prime is 25668180720011. The reversal of 25668180720001 is 10002708186652.

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 4904346859776 + 20763833860225 = 2214576^2 + 4556735^2 .

It is a cyclic number.

It is not a de Polignac number, because 25668180720001 - 2⁷ = 25668180719873 is a prime.

It is a super-2 number, since 2×25668180720001² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668180720011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6896339010 + ... + 6896342731.

It is an arithmetic number, because the mean of its divisors is an integer number (6420493350901).

Almost surely, 2^{25668180720001} is an apocalyptic number.

It is an amenable number.

25668180720001 is a deficient number, since it is larger than the sum of its proper divisors (13792683603).

25668180720001 is a wasteful number, since it uses less digits than its factorization.

25668180720001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792683602.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 25668180720001 in words is "twenty-five trillion, six hundred sixty-eight billion, one hundred eighty million, seven hundred twenty thousand, one".