42989432643 has 16 divisors (see below), whose sum is σ = 63818844160. Its totient is φ = 28600763688.

The previous prime is 42989432639. The next prime is 42989432653. The reversal of 42989432643 is 34623498924.

42989432643 is a `hidden beast` number, since 4 + 298 + 94 + 3 + 264 + 3 = 666.

It is not a de Polignac number, because 42989432643 - 2² = 42989432639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42989432643.

It is not an unprimeable number, because it can be changed into a prime (42989432653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1621555 + ... + 1647852.

It is an arithmetic number, because the mean of its divisors is an integer number (3988677760).

Almost surely, 2^42989432643 is an apocalyptic number.

42989432643 is a deficient number, since it is larger than the sum of its proper divisors (20829411517).

42989432643 is a wasteful number, since it uses less digits than its factorization.

42989432643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269903 (or 3269897 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The spelling of 42989432643 in words is "forty-two billion, nine hundred eighty-nine million, four hundred thirty-two thousand, six hundred forty-three".