27861152856 has 32 divisors (see below), whose sum is σ = 72681269760. Its totient is φ = 8883265952.

The previous prime is 27861152849. The next prime is 27861152881. The reversal of 27861152856 is 65825116872.

It is a junction number, because it is equal to n+sod(n) for n = 27861152799 and 27861152808.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25236000 + ... + 25237103.

It is an arithmetic number, because the mean of its divisors is an integer number (2271289680).

Almost surely, 2^27861152856 is an apocalyptic number.

It is an amenable number.

27861152856 is an abundant number, since it is smaller than the sum of its proper divisors (44820116904).

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

27861152856 is a wasteful number, since it uses less digits than its factorization.

27861152856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50473135 (or 50473131 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The spelling of 27861152856 in words is "twenty-seven billion, eight hundred sixty-one million, one hundred fifty-two thousand, eight hundred fifty-six".