27565100201501 has 4 divisors (see below), whose sum is σ = 28085196431772. Its totient is φ = 27045003971232.

The previous prime is 27565100201491. The next prime is 27565100201567. The reversal of 27565100201501 is 10510200156572.

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 19258282757476 + 8306817444025 = 4388426^2 + 2882155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27565100201501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27565100201201) 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, 260048115056 + ... + 260048115161.

It is an arithmetic number, because the mean of its divisors is an integer number (7021299107943).

Almost surely, 2^{27565100201501} is an apocalyptic number.

It is an amenable number.

27565100201501 is a deficient number, since it is larger than the sum of its proper divisors (520096230271).

27565100201501 is an equidigital number, since it uses as much as digits as its factorization.

27565100201501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520096230270.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 27565100201501 in words is "twenty-seven trillion, five hundred sixty-five billion, one hundred million, two hundred one thousand, five hundred one".