42305745643 has 4 divisors (see below), whose sum is σ = 48349423600. Its totient is φ = 36262067688.

The previous prime is 42305745617. The next prime is 42305745653. The reversal of 42305745643 is 34654750324.

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

It is not a de Polignac number, because 42305745643 - 2⁵ = 42305745611 is a prime.

It is a super-2 number, since 2×42305745643² (a number of 22 digits) contains 22 as substring.

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 42305745643.

It is not an unprimeable number, because it can be changed into a prime (42305745653) 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, 3021838968 + ... + 3021838981.

It is an arithmetic number, because the mean of its divisors is an integer number (12087355900).

Almost surely, 2^42305745643 is an apocalyptic number.

42305745643 is a deficient number, since it is larger than the sum of its proper divisors (6043677957).

42305745643 is an equidigital number, since it uses as much as digits as its factorization.

42305745643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6043677956.

The product of its (nonzero) digits is 1209600, while the sum is 43.

The spelling of 42305745643 in words is "forty-two billion, three hundred five million, seven hundred forty-five thousand, six hundred forty-three".