27771808716 has 60 divisors (see below), whose sum is σ = 72683963352. Its totient is φ = 9246690432.

The previous prime is 27771808711. The next prime is 27771808741. The reversal of 27771808716 is 61780817772.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (27771808711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 237556 + ... + 334628.

Almost surely, 2^27771808716 is an apocalyptic number.

It is an amenable number.

27771808716 is an abundant number, since it is smaller than the sum of its proper divisors (44912154636).

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

27771808716 is a wasteful number, since it uses less digits than its factorization.

27771808716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97972 (or 97961 counting only the distinct ones).

The product of its (nonzero) digits is 1843968, while the sum is 54.

The spelling of 27771808716 in words is "twenty-seven billion, seven hundred seventy-one million, eight hundred eight thousand, seven hundred sixteen".