27793776820 has 12 divisors (see below), whose sum is σ = 58366931364. Its totient is φ = 11117510720.

The previous prime is 27793776811. The next prime is 27793776839. The reversal of 27793776820 is 2867739772.

It can be written as a sum of positive squares in 2 ways, for example, as 9930919716 + 17862857104 = 99654^2 + 133652^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694844401 + ... + 694844440.

It is an arithmetic number, because the mean of its divisors is an integer number (4863910947).

Almost surely, 2^27793776820 is an apocalyptic number.

27793776820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27793776820 is an abundant number, since it is smaller than the sum of its proper divisors (30573154544).

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

27793776820 is a wasteful number, since it uses less digits than its factorization.

27793776820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389688850 (or 1389688848 counting only the distinct ones).

The product of its (nonzero) digits is 12446784, while the sum is 58.

The spelling of 27793776820 in words is "twenty-seven billion, seven hundred ninety-three million, seven hundred seventy-six thousand, eight hundred twenty".