27768861164 has 24 divisors (see below), whose sum is σ = 53608942800. Its totient is φ = 12480385280.

The previous prime is 27768861161. The next prime is 27768861199. The reversal of 27768861164 is 46116886772.

It is a happy number.

It is a super-2 number, since 2×27768861164² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27768861161) 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, 3541649 + ... + 3549480.

It is an arithmetic number, because the mean of its divisors is an integer number (2233705950).

Almost surely, 2^27768861164 is an apocalyptic number.

It is an amenable number.

27768861164 is a deficient number, since it is larger than the sum of its proper divisors (25840081636).

27768861164 is a wasteful number, since it uses less digits than its factorization.

27768861164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091233 (or 7091231 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 56.

The spelling of 27768861164 in words is "twenty-seven billion, seven hundred sixty-eight million, eight hundred sixty-one thousand, one hundred sixty-four".