42473165891 has 16 divisors (see below), whose sum is σ = 48530510784. Its totient is φ = 36823901184.

The previous prime is 42473165863. The next prime is 42473165921. The reversal of 42473165891 is 19856137424.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42473165891 - 2²⁶ = 42406057027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42473165191) 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, 89690 + ... + 304943.

It is an arithmetic number, because the mean of its divisors is an integer number (3033156924).

Almost surely, 2^42473165891 is an apocalyptic number.

42473165891 is a deficient number, since it is larger than the sum of its proper divisors (6057344893).

42473165891 is a wasteful number, since it uses less digits than its factorization.

42473165891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395150.

The product of its digits is 1451520, while the sum is 50.

The spelling of 42473165891 in words is "forty-two billion, four hundred seventy-three million, one hundred sixty-five thousand, eight hundred ninety-one".