27438974739 has 24 divisors (see below), whose sum is σ = 43656966912. Its totient is φ = 16468222320.

The previous prime is 27438974737. The next prime is 27438974741. The reversal of 27438974739 is 93747983472.

27438974739 is a `hidden beast` number, since 2 + 74 + 3 + 8 + 97 + 473 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (27438974737) and next prime (27438974741).

It is not a de Polignac number, because 27438974739 - 2¹ = 27438974737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27438974737) 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 23 ways as a sum of consecutive naturals, for example, 1335247 + ... + 1355640.

It is an arithmetic number, because the mean of its divisors is an integer number (1819040288).

Almost surely, 2^27438974739 is an apocalyptic number.

27438974739 is a deficient number, since it is larger than the sum of its proper divisors (16217992173).

27438974739 is a wasteful number, since it uses less digits than its factorization.

27438974739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691007 (or 2691004 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 63.

The spelling of 27438974739 in words is "twenty-seven billion, four hundred thirty-eight million, nine hundred seventy-four thousand, seven hundred thirty-nine".