27738834939 has 64 divisors (see below), whose sum is σ = 44061068800. Its totient is φ = 17195068800.

The previous prime is 27738834883. The next prime is 27738834943. The reversal of 27738834939 is 93943883772.

It is not a de Polignac number, because 27738834939 - 2⁹ = 27738834427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27738834989) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25378077 + ... + 25379169.

It is an arithmetic number, because the mean of its divisors is an integer number (688454200).

Almost surely, 2^27738834939 is an apocalyptic number.

27738834939 is a deficient number, since it is larger than the sum of its proper divisors (16322233861).

27738834939 is a wasteful number, since it uses less digits than its factorization.

27738834939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1987 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 27738834939 in words is "twenty-seven billion, seven hundred thirty-eight million, eight hundred thirty-four thousand, nine hundred thirty-nine".