74843877691 has 4 divisors (see below), whose sum is σ = 81647866584. Its totient is φ = 68039888800.

The previous prime is 74843877673. The next prime is 74843877707. The reversal of 74843877691 is 19677834847.

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

It is a cyclic number.

It is not a de Polignac number, because 74843877691 - 2¹⁵ = 74843844923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74843877631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3401994430 + ... + 3401994451.

It is an arithmetic number, because the mean of its divisors is an integer number (20411966646).

Almost surely, 2^74843877691 is an apocalyptic number.

74843877691 is a deficient number, since it is larger than the sum of its proper divisors (6803988893).

74843877691 is a wasteful number, since it uses less digits than its factorization.

74843877691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803988892.

The product of its digits is 56899584, while the sum is 64.

The spelling of 74843877691 in words is "seventy-four billion, eight hundred forty-three million, eight hundred seventy-seven thousand, six hundred ninety-one".