27768860812 has 24 divisors (see below), whose sum is σ = 60586606080. Its totient is φ = 10819036560.

The previous prime is 27768860809. The next prime is 27768860813. The reversal of 27768860812 is 21806886772.

It is a super-2 number, since 2×27768860812² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27768860813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45079012 + ... + 45079627.

It is an arithmetic number, because the mean of its divisors is an integer number (2524441920).

Almost surely, 2^27768860812 is an apocalyptic number.

27768860812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

27768860812 is an abundant number, since it is smaller than the sum of its proper divisors (32817745268).

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

27768860812 is a wasteful number, since it uses less digits than its factorization.

27768860812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90158661 (or 90158659 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 27768860812 in words is "twenty-seven billion, seven hundred sixty-eight million, eight hundred sixty thousand, eight hundred twelve".