43542764849 has 2 divisors, whose sum is σ = 43542764850. Its totient is φ = 43542764848.

The previous prime is 43542764833. The next prime is 43542764917. The reversal of 43542764849 is 94846724534.

43542764849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41883669025 + 1659095824 = 204655^2 + 40732^2 .

It is a cyclic number.

It is not a de Polignac number, because 43542764849 - 2⁴ = 43542764833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43542764794 and 43542764803.

It is not a weakly prime, because it can be changed into another prime (43542764809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21771382424 + 21771382425.

It is an arithmetic number, because the mean of its divisors is an integer number (21771382425).

Almost surely, 2^43542764849 is an apocalyptic number.

It is an amenable number.

43542764849 is a deficient number, since it is larger than the sum of its proper divisors (1).

43542764849 is an equidigital number, since it uses as much as digits as its factorization.

43542764849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 56.

The spelling of 43542764849 in words is "forty-three billion, five hundred forty-two million, seven hundred sixty-four thousand, eight hundred forty-nine".