27731644303 has 12 divisors (see below), whose sum is σ = 30532688704. Its totient is φ = 25168572000.

The previous prime is 27731644267. The next prime is 27731644327. The reversal of 27731644303 is 30344613772.

It is a de Polignac number, because none of the positive numbers 2^k-27731644303 is a prime.

It is a super-2 number, since 2×27731644303² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27731744303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117951 + ... + 263392.

Almost surely, 2^27731644303 is an apocalyptic number.

27731644303 is a deficient number, since it is larger than the sum of its proper divisors (2801044401).

27731644303 is a wasteful number, since it uses less digits than its factorization.

27731644303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381966 (or 381955 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 40.

The spelling of 27731644303 in words is "twenty-seven billion, seven hundred thirty-one million, six hundred forty-four thousand, three hundred three".