27397863529 has 3 divisors (see below), whose sum is σ = 27398029053. Its totient is φ = 27397698006.

The previous prime is 27397863517. The next prime is 27397863539. The reversal of 27397863529 is 92536879372.

The square root of 27397863529 is 165523.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 27397863529 - 2³¹ = 25250379881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27397863539) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 82762 + ... + 248284.

It is an arithmetic number, because the mean of its divisors is an integer number (9132676351).

Almost surely, 2^27397863529 is an apocalyptic number.

27397863529 is the 165523-rd square number.

27397863529 is the 82762-nd centered octagonal number.

It is an amenable number.

27397863529 is a deficient number, since it is larger than the sum of its proper divisors (165524).

27397863529 is an frugal number, since it uses more digits than its factorization.

27397863529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331046 (or 165523 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 61.

The spelling of 27397863529 in words is "twenty-seven billion, three hundred ninety-seven million, eight hundred sixty-three thousand, five hundred twenty-nine".