27877668012 has 18 divisors (see below), whose sum is σ = 70468549788. Its totient is φ = 9292555992.

The previous prime is 27877668001. The next prime is 27877668041. The reversal of 27877668012 is 21086677872.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 27877668012.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387189798 + ... + 387189869.

Almost surely, 2^27877668012 is an apocalyptic number.

It is an amenable number.

27877668012 is an abundant number, since it is smaller than the sum of its proper divisors (42590881776).

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

27877668012 is a wasteful number, since it uses less digits than its factorization.

27877668012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774379677 (or 774379672 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 27877668012 in words is "twenty-seven billion, eight hundred seventy-seven million, six hundred sixty-eight thousand, twelve".