74643922934647 has 4 divisors (see below), whose sum is σ = 81429734110536. Its totient is φ = 67858111758760.

The previous prime is 74643922934593. The next prime is 74643922934671.

74643922934647 is nontrivially palindromic in base 10.

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 74643922934647 - 2¹¹ = 74643922932599 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 (74643922931647) 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, 3392905587928 + ... + 3392905587949.

It is an arithmetic number, because the mean of its divisors is an integer number (20357433527634).

Almost surely, 2^{74643922934647} is an apocalyptic number.

74643922934647 is a deficient number, since it is larger than the sum of its proper divisors (6785811175889).

74643922934647 is a wasteful number, since it uses less digits than its factorization.

74643922934647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6785811175888.

The product of its digits is 1316818944, while the sum is 70.

The spelling of 74643922934647 in words is "seventy-four trillion, six hundred forty-three billion, nine hundred twenty-two million, nine hundred thirty-four thousand, six hundred forty-seven".