27809132461 has 6 divisors (see below), whose sum is σ = 30567063086. Its totient is φ = 25281029400.

The previous prime is 27809132453. The next prime is 27809132467. The reversal of 27809132461 is 16423190872.

It can be written as a sum of positive squares in only one way, i.e., 27695283561 + 113848900 = 166419^2 + 10670^2 .

It is not a de Polignac number, because 27809132461 - 2³ = 27809132453 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 (27809132467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114913650 + ... + 114913891.

Almost surely, 2^27809132461 is an apocalyptic number.

It is an amenable number.

27809132461 is a deficient number, since it is larger than the sum of its proper divisors (2757930625).

27809132461 is a wasteful number, since it uses less digits than its factorization.

27809132461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229827563 (or 229827552 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 27809132461 in words is "twenty-seven billion, eight hundred nine million, one hundred thirty-two thousand, four hundred sixty-one".