27781924033 has 8 divisors (see below), whose sum is σ = 28191723560. Its totient is φ = 27374941440.

The previous prime is 27781924021. The next prime is 27781924073. The reversal of 27781924033 is 33042918772.

It can be written as a sum of positive squares in 4 ways, for example, as 3703574449 + 24078349584 = 60857^2 + 155172^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27781924033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27781924003) 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 7 ways as a sum of consecutive naturals, for example, 684360 + ... + 723817.

It is an arithmetic number, because the mean of its divisors is an integer number (3523965445).

Almost surely, 2^27781924033 is an apocalyptic number.

It is an amenable number.

27781924033 is a deficient number, since it is larger than the sum of its proper divisors (409799527).

27781924033 is a wasteful number, since it uses less digits than its factorization.

27781924033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408467.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 27781924033 in words is "twenty-seven billion, seven hundred eighty-one million, nine hundred twenty-four thousand, thirty-three".