43780345067 has 2 divisors, whose sum is σ = 43780345068. Its totient is φ = 43780345066.

The previous prime is 43780345051. The next prime is 43780345087. The reversal of 43780345067 is 76054308734.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43780345067 - 2⁴ = 43780345051 is a prime.

It is a super-2 number, since 2×43780345067² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43780345087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21890172533 + 21890172534.

It is an arithmetic number, because the mean of its divisors is an integer number (21890172534).

Almost surely, 2^43780345067 is an apocalyptic number.

43780345067 is a deficient number, since it is larger than the sum of its proper divisors (1).

43780345067 is an equidigital number, since it uses as much as digits as its factorization.

43780345067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 43780345067 in words is "forty-three billion, seven hundred eighty million, three hundred forty-five thousand, sixty-seven".