27257141761 has 4 divisors (see below), whose sum is σ = 27279321300. Its totient is φ = 27234962224.

The previous prime is 27257141689. The next prime is 27257141767. The reversal of 27257141761 is 16714175272.

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 23269977025 + 3987164736 = 152545^2 + 63144^2 .

It is a cyclic number.

It is not a de Polignac number, because 27257141761 - 2²⁷ = 27122924033 is a prime.

It is a super-2 number, since 2×27257141761² (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 (27257141767) 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, 11087926 + ... + 11090383.

It is an arithmetic number, because the mean of its divisors is an integer number (6819830325).

Almost surely, 2^27257141761 is an apocalyptic number.

It is an amenable number.

27257141761 is a deficient number, since it is larger than the sum of its proper divisors (22179539).

27257141761 is a wasteful number, since it uses less digits than its factorization.

27257141761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22179538.

The product of its digits is 164640, while the sum is 43.

The spelling of 27257141761 in words is "twenty-seven billion, two hundred fifty-seven million, one hundred forty-one thousand, seven hundred sixty-one".