74388643613 has 4 divisors (see below), whose sum is σ = 74394905088. Its totient is φ = 74382382140.

The previous prime is 74388643603. The next prime is 74388643627. The reversal of 74388643613 is 31634688347.

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 not a de Polignac number, because 74388643613 - 2¹⁰ = 74388642589 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 (74388643603) 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, 3112883 + ... + 3136688.

It is an arithmetic number, because the mean of its divisors is an integer number (18598726272).

Almost surely, 2^74388643613 is an apocalyptic number.

It is an amenable number.

74388643613 is a deficient number, since it is larger than the sum of its proper divisors (6261475).

74388643613 is a wasteful number, since it uses less digits than its factorization.

74388643613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6261474.

The product of its digits is 6967296, while the sum is 53.

The spelling of 74388643613 in words is "seventy-four billion, three hundred eighty-eight million, six hundred forty-three thousand, six hundred thirteen".