74137847789 has 4 divisors (see below), whose sum is σ = 74547449340. Its totient is φ = 73728246240.

The previous prime is 74137847737. The next prime is 74137847809. The reversal of 74137847789 is 98774873147.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20333334025 + 53804513764 = 142595^2 + 231958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74137847789 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 (74137847389) 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, 204800504 + ... + 204800865.

It is an arithmetic number, because the mean of its divisors is an integer number (18636862335).

Almost surely, 2^74137847789 is an apocalyptic number.

It is an amenable number.

74137847789 is a deficient number, since it is larger than the sum of its proper divisors (409601551).

74137847789 is a wasteful number, since it uses less digits than its factorization.

74137847789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409601550.

The product of its digits is 66382848, while the sum is 65.

The spelling of 74137847789 in words is "seventy-four billion, one hundred thirty-seven million, eight hundred forty-seven thousand, seven hundred eighty-nine".