27001745261 has 4 divisors (see below), whose sum is σ = 27059565312. Its totient is φ = 26943925212.

The previous prime is 27001745249. The next prime is 27001745311. The reversal of 27001745261 is 16254710072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27001745261 - 2¹⁴ = 27001728877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27001745461) 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, 28909325 + ... + 28910258.

It is an arithmetic number, because the mean of its divisors is an integer number (6764891328).

Almost surely, 2^27001745261 is an apocalyptic number.

It is an amenable number.

27001745261 is a deficient number, since it is larger than the sum of its proper divisors (57820051).

27001745261 is an equidigital number, since it uses as much as digits as its factorization.

27001745261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57820050.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 27001745261 in words is "twenty-seven billion, one million, seven hundred forty-five thousand, two hundred sixty-one".