74188939973 has 4 divisors (see below), whose sum is σ = 74644087008. Its totient is φ = 73733792940.

The previous prime is 74188939967. The next prime is 74188939997. The reversal of 74188939973 is 37993988147.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74188939973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74188939943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227573273 + ... + 227573598.

It is an arithmetic number, because the mean of its divisors is an integer number (18661021752).

Almost surely, 2^74188939973 is an apocalyptic number.

It is an amenable number.

74188939973 is a deficient number, since it is larger than the sum of its proper divisors (455147035).

74188939973 is a wasteful number, since it uses less digits than its factorization.

74188939973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455147034.

The product of its digits is 82301184, while the sum is 68.

The spelling of 74188939973 in words is "seventy-four billion, one hundred eighty-eight million, nine hundred thirty-nine thousand, nine hundred seventy-three".