74634243647 has 4 divisors (see below), whose sum is σ = 74635186296. Its totient is φ = 74633301000.

The previous prime is 74634243641. The next prime is 74634243683.

74634243647 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 74634243647 - 2⁴ = 74634243631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74634243595 and 74634243604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74634243641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340448 + ... + 514949.

It is an arithmetic number, because the mean of its divisors is an integer number (18658796574).

Almost surely, 2^74634243647 is an apocalyptic number.

74634243647 is a deficient number, since it is larger than the sum of its proper divisors (942649).

74634243647 is an equidigital number, since it uses as much as digits as its factorization.

74634243647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942648.

The product of its digits is 8128512, while the sum is 50.

The spelling of 74634243647 in words is "seventy-four billion, six hundred thirty-four million, two hundred forty-three thousand, six hundred forty-seven".