27781339319 has 4 divisors (see below), whose sum is σ = 27922361544. Its totient is φ = 27640317096.

The previous prime is 27781339309. The next prime is 27781339367. The reversal of 27781339319 is 91393318772.

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 27781339319 - 2²⁰ = 27780290743 is a prime.

It is a super-2 number, since 2×27781339319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27781339309) 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, 70510817 + ... + 70511210.

It is an arithmetic number, because the mean of its divisors is an integer number (6980590386).

Almost surely, 2^27781339319 is an apocalyptic number.

27781339319 is a deficient number, since it is larger than the sum of its proper divisors (141022225).

27781339319 is a wasteful number, since it uses less digits than its factorization.

27781339319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141022224.

The product of its digits is 1714608, while the sum is 53.

The spelling of 27781339319 in words is "twenty-seven billion, seven hundred eighty-one million, three hundred thirty-nine thousand, three hundred nineteen".