27696780819 has 8 divisors (see below), whose sum is σ = 41032267920. Its totient is φ = 18464520528.

The previous prime is 27696780781. The next prime is 27696780821. The reversal of 27696780819 is 91808769672.

It is not a de Polignac number, because 27696780819 - 2⁷ = 27696780691 is a prime.

It is a super-2 number, since 2×27696780819² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27696780889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512903322 + ... + 512903375.

It is an arithmetic number, because the mean of its divisors is an integer number (5129033490).

Almost surely, 2^27696780819 is an apocalyptic number.

27696780819 is a deficient number, since it is larger than the sum of its proper divisors (13335487101).

27696780819 is a wasteful number, since it uses less digits than its factorization.

27696780819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025806706 (or 1025806700 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 27696780819 in words is "twenty-seven billion, six hundred ninety-six million, seven hundred eighty thousand, eight hundred nineteen".