74384494643 has 4 divisors (see below), whose sum is σ = 75787975728. Its totient is φ = 72981013560.

The previous prime is 74384494633. The next prime is 74384494661. The reversal of 74384494643 is 34649448347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34649448347 = 827 ⋅41897761.

It is a cyclic number.

It is not a de Polignac number, because 74384494643 - 2¹⁰ = 74384493619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74384494633) 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, 701740463 + ... + 701740568.

It is an arithmetic number, because the mean of its divisors is an integer number (18946993932).

Almost surely, 2^74384494643 is an apocalyptic number.

74384494643 is a deficient number, since it is larger than the sum of its proper divisors (1403481085).

74384494643 is a wasteful number, since it uses less digits than its factorization.

74384494643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403481084.

The product of its digits is 27869184, while the sum is 56.

The spelling of 74384494643 in words is "seventy-four billion, three hundred eighty-four million, four hundred ninety-four thousand, six hundred forty-three".