27781675552 has 36 divisors (see below), whose sum is σ = 56213462970. Its totient is φ = 13515388416.

The previous prime is 27781675549. The next prime is 27781675591. The reversal of 27781675552 is 25557618772.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 25193308176 + 2588367376 = 158724^2 + 50876^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27781675493 and 27781675502.

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 5 ways as a sum of consecutive naturals, for example, 273277 + ... + 360892.

Almost surely, 2^27781675552 is an apocalyptic number.

It is an amenable number.

27781675552 is an abundant number, since it is smaller than the sum of its proper divisors (28431787418).

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

27781675552 is an equidigital number, since it uses as much as digits as its factorization.

27781675552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634253 (or 634208 counting only the distinct ones).

The product of its digits is 8232000, while the sum is 55.

The spelling of 27781675552 in words is "twenty-seven billion, seven hundred eighty-one million, six hundred seventy-five thousand, five hundred fifty-two".