27964308381543 has 12 divisors (see below), whose sum is σ = 40407626472408. Its totient is φ = 18636070752240.

The previous prime is 27964308381517. The next prime is 27964308381547. The reversal of 27964308381543 is 34518380346972.

It is a happy number.

27964308381543 is a `hidden beast` number, since 2 + 7 + 9 + 6 + 4 + 3 + 0 + 8 + 3 + 81 + 543 = 666.

It is not a de Polignac number, because 27964308381543 - 2⁸ = 27964308381287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27964308381547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566765805 + ... + 566815142.

It is an arithmetic number, because the mean of its divisors is an integer number (3367302206034).

It is a 1-persistent number, because it is pandigital, but 2⋅27964308381543 = 55928616763086 is not.

Almost surely, 2^{27964308381543} is an apocalyptic number.

27964308381543 is a deficient number, since it is larger than the sum of its proper divisors (12443318090865).

27964308381543 is a wasteful number, since it uses less digits than its factorization.

27964308381543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133583694 (or 1133583691 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 27964308381543 in words is "twenty-seven trillion, nine hundred sixty-four billion, three hundred eight million, three hundred eighty-one thousand, five hundred forty-three".