27996267785 has 16 divisors (see below), whose sum is σ = 34486725504. Its totient is φ = 21806209152.

The previous prime is 27996267779. The next prime is 27996267821. The reversal of 27996267785 is 58776269972.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27996267785 - 2⁶ = 27996267721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140717 + ... + 275306.

It is an arithmetic number, because the mean of its divisors is an integer number (2155420344).

Almost surely, 2^27996267785 is an apocalyptic number.

It is an amenable number.

27996267785 is a deficient number, since it is larger than the sum of its proper divisors (6490457719).

27996267785 is a wasteful number, since it uses less digits than its factorization.

27996267785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416384.

The product of its digits is 160030080, while the sum is 68.

The spelling of 27996267785 in words is "twenty-seven billion, nine hundred ninety-six million, two hundred sixty-seven thousand, seven hundred eighty-five".