74421733712447 has 4 divisors (see below), whose sum is σ = 81187345868136. Its totient is φ = 67656121556760.

The previous prime is 74421733712429. The next prime is 74421733712467.

74421733712447 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74421733712447 - 2⁴⁴ = 56829547668031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74421733712392 and 74421733712401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74421733712467) 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, 3382806077828 + ... + 3382806077849.

It is an arithmetic number, because the mean of its divisors is an integer number (20296836467034).

Almost surely, 2^{74421733712447} is an apocalyptic number.

74421733712447 is a deficient number, since it is larger than the sum of its proper divisors (6765612155689).

74421733712447 is a wasteful number, since it uses less digits than its factorization.

74421733712447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6765612155688.

The product of its digits is 22127616, while the sum is 56.

The spelling of 74421733712447 in words is "seventy-four trillion, four hundred twenty-one billion, seven hundred thirty-three million, seven hundred twelve thousand, four hundred forty-seven".