74784336634864 has 80 divisors (see below), whose sum is σ = 153330378084864. Its totient is φ = 35261183865600.

The previous prime is 74784336634831. The next prime is 74784336634867. The reversal of 74784336634864 is 46843663348747.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74784336634867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 848880802 + ... + 848968894.

Almost surely, 2^{74784336634864} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74784336634864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76665189042432).

74784336634864 is an abundant number, since it is smaller than the sum of its proper divisors (78546041450000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74784336634864 is a wasteful number, since it uses less digits than its factorization.

74784336634864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120686 (or 120680 counting only the distinct ones).

The product of its digits is 4682022912, while the sum is 73.

The spelling of 74784336634864 in words is "seventy-four trillion, seven hundred eighty-four billion, three hundred thirty-six million, six hundred thirty-four thousand, eight hundred sixty-four".