27721106768 has 20 divisors (see below), whose sum is σ = 53712770868. Its totient is φ = 13859746560.

The previous prime is 27721106767. The next prime is 27721106807. The reversal of 27721106768 is 86760112772.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16550307904 + 11170798864 = 128648^2 + 105692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27721106767) 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, 311930 + ... + 390822.

Almost surely, 2^27721106768 is an apocalyptic number.

It is an amenable number.

27721106768 is a deficient number, since it is larger than the sum of its proper divisors (25991664100).

27721106768 is a wasteful number, since it uses less digits than its factorization.

27721106768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100862 (or 100856 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 27721106768 in words is "twenty-seven billion, seven hundred twenty-one million, one hundred six thousand, seven hundred sixty-eight".