27938596484639 has 2 divisors, whose sum is σ = 27938596484640. Its totient is φ = 27938596484638.

The previous prime is 27938596484609. The next prime is 27938596484759. The reversal of 27938596484639 is 93648469583972.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27938596484639 - 2²⁸ = 27938328049183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27938596484609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13969298242319 + 13969298242320.

It is an arithmetic number, because the mean of its divisors is an integer number (13969298242320).

Almost surely, 2^{27938596484639} is an apocalyptic number.

27938596484639 is a deficient number, since it is larger than the sum of its proper divisors (1).

27938596484639 is an equidigital number, since it uses as much as digits as its factorization.

27938596484639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16930529280, while the sum is 83.

The spelling of 27938596484639 in words is "twenty-seven trillion, nine hundred thirty-eight billion, five hundred ninety-six million, four hundred eighty-four thousand, six hundred thirty-nine".