74301420506821 has 4 divisors (see below), whose sum is σ = 74301687679212. Its totient is φ = 74301153334432.

The previous prime is 74301420506759. The next prime is 74301420506837. The reversal of 74301420506821 is 12860502410347.

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 27832862770596 + 46468557736225 = 5275686^2 + 6816785^2 .

It is a cyclic number.

It is not a de Polignac number, because 74301420506821 - 2¹⁹ = 74301419982533 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 (74301420504821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133168606 + ... + 133725391.

It is an arithmetic number, because the mean of its divisors is an integer number (18575421919803).

Almost surely, 2^{74301420506821} is an apocalyptic number.

It is an amenable number.

74301420506821 is a deficient number, since it is larger than the sum of its proper divisors (267172391).

74301420506821 is a wasteful number, since it uses less digits than its factorization.

74301420506821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267172390.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 74301420506821 in words is "seventy-four trillion, three hundred one billion, four hundred twenty million, five hundred six thousand, eight hundred twenty-one".