74648722784647 has 4 divisors (see below), whose sum is σ = 81434970310536. Its totient is φ = 67862475258760.

The previous prime is 74648722784639. The next prime is 74648722784693.

74648722784647 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 74648722784647 - 2³ = 74648722784639 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74648722784617) 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, 3393123762928 + ... + 3393123762949.

It is an arithmetic number, because the mean of its divisors is an integer number (20358742577634).

Almost surely, 2^{74648722784647} is an apocalyptic number.

74648722784647 is a deficient number, since it is larger than the sum of its proper divisors (6786247525889).

74648722784647 is a wasteful number, since it uses less digits than its factorization.

74648722784647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786247525888.

The product of its digits is 5664669696, while the sum is 76.

The spelling of 74648722784647 in words is "seventy-four trillion, six hundred forty-eight billion, seven hundred twenty-two million, seven hundred eighty-four thousand, six hundred forty-seven".