27771621716 has 24 divisors (see below), whose sum is σ = 49198971360. Its totient is φ = 13714862112.

The previous prime is 27771621667. The next prime is 27771621781. The reversal of 27771621716 is 61712617772.

It is a congruent number.

It is an unprimeable number.

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, 1581215 + ... + 1598681.

It is an arithmetic number, because the mean of its divisors is an integer number (2049957140).

Almost surely, 2^27771621716 is an apocalyptic number.

It is an amenable number.

27771621716 is a deficient number, since it is larger than the sum of its proper divisors (21427349644).

27771621716 is a wasteful number, since it uses less digits than its factorization.

27771621716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22343 (or 22341 counting only the distinct ones).

The product of its digits is 345744, while the sum is 47.

The spelling of 27771621716 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred twenty-one thousand, seven hundred sixteen".