27991673068 has 12 divisors (see below), whose sum is σ = 51866923752. Its totient is φ = 13172552000.

The previous prime is 27991673029. The next prime is 27991673093. The reversal of 27991673068 is 86037619972.

It is a super-2 number, since 2×27991673068² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205821058 + ... + 205821193.

It is an arithmetic number, because the mean of its divisors is an integer number (4322243646).

Almost surely, 2^27991673068 is an apocalyptic number.

It is an amenable number.

27991673068 is a deficient number, since it is larger than the sum of its proper divisors (23875250684).

27991673068 is a wasteful number, since it uses less digits than its factorization.

27991673068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411642272 (or 411642270 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 27991673068 in words is "twenty-seven billion, nine hundred ninety-one million, six hundred seventy-three thousand, sixty-eight".