42145243643 has 8 divisors (see below), whose sum is σ = 45830440512. Its totient is φ = 38594054016.

The previous prime is 42145243639. The next prime is 42145243709. The reversal of 42145243643 is 34634254124.

42145243643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42145243643 - 2² = 42145243639 is a prime.

It is a super-2 number, since 2×42145243643² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42145243597 and 42145243606.

It is not an unprimeable number, because it can be changed into a prime (42145243603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33501155 + ... + 33502412.

It is an arithmetic number, because the mean of its divisors is an integer number (5728805064).

Almost surely, 2^42145243643 is an apocalyptic number.

42145243643 is a deficient number, since it is larger than the sum of its proper divisors (3685196869).

42145243643 is a wasteful number, since it uses less digits than its factorization.

42145243643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67003621.

The product of its digits is 276480, while the sum is 38.

Adding to 42145243643 its reverse (34634254124), we get a palindrome (76779497767).

The spelling of 42145243643 in words is "forty-two billion, one hundred forty-five million, two hundred forty-three thousand, six hundred forty-three".