543748591649 has 2 divisors, whose sum is σ = 543748591650. Its totient is φ = 543748591648.

The previous prime is 543748591609. The next prime is 543748591669. The reversal of 543748591649 is 946195847345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348609946624 + 195138645025 = 590432^2 + 441745^2 .

It is a cyclic number.

It is not a de Polignac number, because 543748591649 - 2¹² = 543748587553 is a prime.

It is not a weakly prime, because it can be changed into another prime (543748591609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271874295824 + 271874295825.

It is an arithmetic number, because the mean of its divisors is an integer number (271874295825).

Almost surely, 2^543748591649 is an apocalyptic number.

It is an amenable number.

543748591649 is a deficient number, since it is larger than the sum of its proper divisors (1).

543748591649 is an equidigital number, since it uses as much as digits as its factorization.

543748591649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130636800, while the sum is 65.

The spelling of 543748591649 in words is "five hundred forty-three billion, seven hundred forty-eight million, five hundred ninety-one thousand, six hundred forty-nine".