27976971908 has 6 divisors (see below), whose sum is σ = 48959700846. Its totient is φ = 13988485952.

The previous prime is 27976971839. The next prime is 27976971923. The reversal of 27976971908 is 80917967972.

It can be written as a sum of positive squares in only one way, i.e., 15595513924 + 12381457984 = 124882^2 + 111272^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3497121485 + ... + 3497121492.

It is an arithmetic number, because the mean of its divisors is an integer number (8159950141).

Almost surely, 2^27976971908 is an apocalyptic number.

It is an amenable number.

27976971908 is a deficient number, since it is larger than the sum of its proper divisors (20982728938).

27976971908 is a wasteful number, since it uses less digits than its factorization.

27976971908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994242981 (or 6994242979 counting only the distinct ones).

The product of its (nonzero) digits is 24004512, while the sum is 65.

The spelling of 27976971908 in words is "twenty-seven billion, nine hundred seventy-six million, nine hundred seventy-one thousand, nine hundred eight".