27219381391907 has 4 divisors (see below), whose sum is σ = 27386371461960. Its totient is φ = 27052391321856.

The previous prime is 27219381391871. The next prime is 27219381391919. The reversal of 27219381391907 is 70919318391272.

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

It is a cyclic number.

It is not a de Polignac number, because 27219381391907 - 2¹⁴ = 27219381375523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27219381391907.

It is not an unprimeable number, because it can be changed into a prime (27219381391927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83495034782 + ... + 83495035107.

It is an arithmetic number, because the mean of its divisors is an integer number (6846592865490).

Almost surely, 2^{27219381391907} is an apocalyptic number.

27219381391907 is a deficient number, since it is larger than the sum of its proper divisors (166990070053).

27219381391907 is a wasteful number, since it uses less digits than its factorization.

27219381391907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166990070052.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The spelling of 27219381391907 in words is "twenty-seven trillion, two hundred nineteen billion, three hundred eighty-one million, three hundred ninety-one thousand, nine hundred seven".