27723427649 has 16 divisors (see below), whose sum is σ = 29312280000. Its totient is φ = 26147784960.

The previous prime is 27723427639. The next prime is 27723427663. The reversal of 27723427649 is 94672432772.

It is a cyclic number.

It is not a de Polignac number, because 27723427649 - 2⁸ = 27723427393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27723427649.

It is not an unprimeable number, because it can be changed into a prime (27723427639) 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, 5085077 + ... + 5090525.

It is an arithmetic number, because the mean of its divisors is an integer number (1832017500).

Almost surely, 2^27723427649 is an apocalyptic number.

It is an amenable number.

27723427649 is a deficient number, since it is larger than the sum of its proper divisors (1588852351).

27723427649 is a wasteful number, since it uses less digits than its factorization.

27723427649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608.

The product of its digits is 7112448, while the sum is 53.

The spelling of 27723427649 in words is "twenty-seven billion, seven hundred twenty-three million, four hundred twenty-seven thousand, six hundred forty-nine".