27986946543 has 6 divisors (see below), whose sum is σ = 40425589464. Its totient is φ = 18657964356.

The previous prime is 27986946523. The next prime is 27986946571. The reversal of 27986946543 is 34564968972.

27986946543 is a `hidden beast` number, since 2 + 7 + 9 + 86 + 9 + 4 + 6 + 543 = 666.

It is not a de Polignac number, because 27986946543 - 2⁵ = 27986946511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27986946523) 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 5 ways as a sum of consecutive naturals, for example, 1554830355 + ... + 1554830372.

It is an arithmetic number, because the mean of its divisors is an integer number (6737598244).

Almost surely, 2^27986946543 is an apocalyptic number.

27986946543 is a deficient number, since it is larger than the sum of its proper divisors (12438642921).

27986946543 is a wasteful number, since it uses less digits than its factorization.

27986946543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109660733 (or 3109660730 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 27986946543 in words is "twenty-seven billion, nine hundred eighty-six million, nine hundred forty-six thousand, five hundred forty-three".