43071643619 has 2 divisors, whose sum is σ = 43071643620. Its totient is φ = 43071643618.

The previous prime is 43071643597. The next prime is 43071643661. The reversal of 43071643619 is 91634617034.

43071643619 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43071643619 is a prime.

It is a super-2 number, since 2×43071643619² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43071643619.

It is not a weakly prime, because it can be changed into another prime (43071643679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21535821809 + 21535821810.

It is an arithmetic number, because the mean of its divisors is an integer number (21535821810).

Almost surely, 2^43071643619 is an apocalyptic number.

43071643619 is a deficient number, since it is larger than the sum of its proper divisors (1).

43071643619 is an equidigital number, since it uses as much as digits as its factorization.

43071643619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 43071643619 in words is "forty-three billion, seventy-one million, six hundred forty-three thousand, six hundred nineteen".