27934498181 has 4 divisors (see below), whose sum is σ = 27935662092. Its totient is φ = 27933334272.

The previous prime is 27934498129. The next prime is 27934498183. The reversal of 27934498181 is 18189443972.

It is a happy number.

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 8642677156 + 19291821025 = 92966^2 + 138895^2 .

It is a cyclic number.

It is not a de Polignac number, because 27934498181 - 2³⁰ = 26860756357 is a prime.

It is a super-2 number, since 2×27934498181² (a number of 22 digits) contains 22 as substring.

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 (27934498183) 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, 545180 + ... + 594213.

It is an arithmetic number, because the mean of its divisors is an integer number (6983915523).

Almost surely, 2^27934498181 is an apocalyptic number.

It is an amenable number.

27934498181 is a deficient number, since it is larger than the sum of its proper divisors (1163911).

27934498181 is a wasteful number, since it uses less digits than its factorization.

27934498181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163910.

The product of its digits is 3483648, while the sum is 56.

The spelling of 27934498181 in words is "twenty-seven billion, nine hundred thirty-four million, four hundred ninety-eight thousand, one hundred eighty-one".