27919315969 has 4 divisors (see below), whose sum is σ = 29133199296. Its totient is φ = 26705432644.

The previous prime is 27919315937. The next prime is 27919315973. The reversal of 27919315969 is 96951391972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27919315969 - 2⁵ = 27919315937 is a prime.

It is a super-2 number, since 2×27919315969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27919315979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606941629 + ... + 606941674.

It is an arithmetic number, because the mean of its divisors is an integer number (7283299824).

Almost surely, 2^27919315969 is an apocalyptic number.

It is an amenable number.

27919315969 is a deficient number, since it is larger than the sum of its proper divisors (1213883327).

27919315969 is a wasteful number, since it uses less digits than its factorization.

27919315969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213883326.

The product of its digits is 8266860, while the sum is 61.

The spelling of 27919315969 in words is "twenty-seven billion, nine hundred nineteen million, three hundred fifteen thousand, nine hundred sixty-nine".