27771920994 has 16 divisors (see below), whose sum is σ = 56053419840. Its totient is φ = 9172377360.

The previous prime is 27771920951. The next prime is 27771920999. The reversal of 27771920994 is 49902917772.

It is not an unprimeable number, because it can be changed into a prime (27771920999) 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, 21231702 + ... + 21233009.

It is an arithmetic number, because the mean of its divisors is an integer number (3503338740).

Almost surely, 2^27771920994 is an apocalyptic number.

27771920994 is an abundant number, since it is smaller than the sum of its proper divisors (28281498846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27771920994 is a wasteful number, since it uses less digits than its factorization.

27771920994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42464825.

The product of its (nonzero) digits is 4000752, while the sum is 57.

The spelling of 27771920994 in words is "twenty-seven billion, seven hundred seventy-one million, nine hundred twenty thousand, nine hundred ninety-four".