73889560643 has 4 divisors (see below), whose sum is σ = 73899693960. Its totient is φ = 73879427328.

The previous prime is 73889560543. The next prime is 73889560649. The reversal of 73889560643 is 34606598837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34606598837 = 2017 ⋅17157461.

It is a cyclic number.

It is not a de Polignac number, because 73889560643 - 2¹⁶ = 73889495107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73889560649) 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, 5055713 + ... + 5070306.

It is an arithmetic number, because the mean of its divisors is an integer number (18474923490).

Almost surely, 2^73889560643 is an apocalyptic number.

73889560643 is a deficient number, since it is larger than the sum of its proper divisors (10133317).

73889560643 is a wasteful number, since it uses less digits than its factorization.

73889560643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10133316.

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 73889560643 in words is "seventy-three billion, eight hundred eighty-nine million, five hundred sixty thousand, six hundred forty-three".