3945737839643 has 4 divisors (see below), whose sum is σ = 3953975288640. Its totient is φ = 3937500390648.

The previous prime is 3945737839613. The next prime is 3945737839669. The reversal of 3945737839643 is 3469387375493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3945737839643 - 2¹² = 3945737835547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3945737839613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4118723780 + ... + 4118724737.

It is an arithmetic number, because the mean of its divisors is an integer number (988493822160).

Almost surely, 2^{3945737839643} is an apocalyptic number.

3945737839643 is a deficient number, since it is larger than the sum of its proper divisors (8237448997).

3945737839643 is an equidigital number, since it uses as much as digits as its factorization.

3945737839643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237448996.

The product of its digits is 1234517760, while the sum is 71.

The spelling of 3945737839643 in words is "three trillion, nine hundred forty-five billion, seven hundred thirty-seven million, eight hundred thirty-nine thousand, six hundred forty-three".