42943894413 has 16 divisors (see below), whose sum is σ = 65463404160. Its totient is φ = 24529959936.

The previous prime is 42943894397. The next prime is 42943894439. The reversal of 42943894413 is 31449834924.

It is a happy number.

It is not a de Polignac number, because 42943894413 - 2⁴ = 42943894397 is a prime.

It is a super-2 number, since 2×42943894413² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42943894013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335748 + ... + 445661.

It is an arithmetic number, because the mean of its divisors is an integer number (4091462760).

Almost surely, 2^42943894413 is an apocalyptic number.

It is an amenable number.

42943894413 is a deficient number, since it is larger than the sum of its proper divisors (22519509747).

42943894413 is a wasteful number, since it uses less digits than its factorization.

42943894413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784036.

The product of its digits is 2985984, while the sum is 51.

The spelling of 42943894413 in words is "forty-two billion, nine hundred forty-three million, eight hundred ninety-four thousand, four hundred thirteen".