74058721684621 has 4 divisors (see below), whose sum is σ = 78415117077852. Its totient is φ = 69702326291392.

The previous prime is 74058721684601. The next prime is 74058721684627. The reversal of 74058721684621 is 12648612785047.

It is a happy number.

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 28822188076900 + 45236533607721 = 5368630^2 + 6725811^2 .

It is a cyclic number.

It is not a de Polignac number, because 74058721684621 - 2¹⁵ = 74058721651853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74058721684621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74058721684627) 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, 2178197696590 + ... + 2178197696623.

It is an arithmetic number, because the mean of its divisors is an integer number (19603779269463).

Almost surely, 2^{74058721684621} is an apocalyptic number.

It is an amenable number.

74058721684621 is a deficient number, since it is larger than the sum of its proper divisors (4356395393231).

74058721684621 is a wasteful number, since it uses less digits than its factorization.

74058721684621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356395393230.

The product of its (nonzero) digits is 36126720, while the sum is 61.

The spelling of 74058721684621 in words is "seventy-four trillion, fifty-eight billion, seven hundred twenty-one million, six hundred eighty-four thousand, six hundred twenty-one".