27771581323 has 16 divisors (see below), whose sum is σ = 29401449984. Its totient is φ = 26198748000.

The previous prime is 27771581269. The next prime is 27771581381. The reversal of 27771581323 is 32318517772.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27771581323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27771581423) 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 15 ways as a sum of consecutive naturals, for example, 111448 + ... + 260698.

It is an arithmetic number, because the mean of its divisors is an integer number (1837590624).

Almost surely, 2^27771581323 is an apocalyptic number.

27771581323 is a deficient number, since it is larger than the sum of its proper divisors (1629868661).

27771581323 is a wasteful number, since it uses less digits than its factorization.

27771581323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149442.

The product of its digits is 493920, while the sum is 46.

The spelling of 27771581323 in words is "twenty-seven billion, seven hundred seventy-one million, five hundred eighty-one thousand, three hundred twenty-three".