74343743440 has 80 divisors (see below), whose sum is σ = 180819118800. Its totient is φ = 28389380096.

The previous prime is 74343743429. The next prime is 74343743447. The reversal of 74343743440 is 4434734347.

It can be written as a sum of positive squares in 8 ways, for example, as 372798864 + 73970944576 = 19308^2 + 271976^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74343743447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26454 + ... + 386506.

It is an arithmetic number, because the mean of its divisors is an integer number (2260238985).

Almost surely, 2^74343743440 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 74343743440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90409559400).

74343743440 is an abundant number, since it is smaller than the sum of its proper divisors (106475375360).

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

74343743440 is a wasteful number, since it uses less digits than its factorization.

74343743440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360184 (or 360178 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 43.

The spelling of 74343743440 in words is "seventy-four billion, three hundred forty-three million, seven hundred forty-three thousand, four hundred forty".