27639607379 has 4 divisors (see below), whose sum is σ = 27913266960. Its totient is φ = 27365947800.

The previous prime is 27639607349. The next prime is 27639607397. The reversal of 27639607379 is 97370693672.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27639607379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27639607349) 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, 136829639 + ... + 136829840.

It is an arithmetic number, because the mean of its divisors is an integer number (6978316740).

Almost surely, 2^27639607379 is an apocalyptic number.

27639607379 is a deficient number, since it is larger than the sum of its proper divisors (273659581).

27639607379 is a wasteful number, since it uses less digits than its factorization.

27639607379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273659580.

The product of its (nonzero) digits is 18003384, while the sum is 59.

The spelling of 27639607379 in words is "twenty-seven billion, six hundred thirty-nine million, six hundred seven thousand, three hundred seventy-nine".