27806198722 has 16 divisors (see below), whose sum is σ = 41984857152. Its totient is φ = 13811288400.

The previous prime is 27806198713. The next prime is 27806198723. The reversal of 27806198722 is 22789160872.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27806198722.

It is not an unprimeable number, because it can be changed into a prime (27806198723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1852347 + ... + 1867297.

It is an arithmetic number, because the mean of its divisors is an integer number (2624053572).

Almost surely, 2^27806198722 is an apocalyptic number.

27806198722 is a deficient number, since it is larger than the sum of its proper divisors (14178658430).

27806198722 is a wasteful number, since it uses less digits than its factorization.

27806198722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21033.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 27806198722 in words is "twenty-seven billion, eight hundred six million, one hundred ninety-eight thousand, seven hundred twenty-two".