27247634381 has 16 divisors (see below), whose sum is σ = 30011051328. Its totient is φ = 24736939920.

The previous prime is 27247634369. The next prime is 27247634389. The reversal of 27247634381 is 18343674272.

It is a de Polignac number, because none of the positive numbers 2^k-27247634381 is a prime.

It is a super-2 number, since 2×27247634381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27247634389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 994046 + ... + 1021088.

It is an arithmetic number, because the mean of its divisors is an integer number (1875690708).

Almost surely, 2^27247634381 is an apocalyptic number.

It is an amenable number.

27247634381 is a deficient number, since it is larger than the sum of its proper divisors (2763416947).

27247634381 is an equidigital number, since it uses as much as digits as its factorization.

27247634381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27833 (or 27811 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 47.

The spelling of 27247634381 in words is "twenty-seven billion, two hundred forty-seven million, six hundred thirty-four thousand, three hundred eighty-one".