74434644643447 has 32 divisors (see below), whose sum is σ = 82905333848064. Its totient is φ = 66263783961600.

The previous prime is 74434644643423. The next prime is 74434644643501.

74434644643447 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 74434644643447 - 2¹⁵ = 74434644610679 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 (74434644643847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129506338 + ... + 130079824.

It is an arithmetic number, because the mean of its divisors is an integer number (2590791682752).

Almost surely, 2^{74434644643447} is an apocalyptic number.

74434644643447 is a deficient number, since it is larger than the sum of its proper divisors (8470689204617).

74434644643447 is a wasteful number, since it uses less digits than its factorization.

74434644643447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574879.

The product of its digits is 1040449536, while the sum is 64.

The spelling of 74434644643447 in words is "seventy-four trillion, four hundred thirty-four billion, six hundred forty-four million, six hundred forty-three thousand, four hundred forty-seven".