74543134720 has 192 divisors, whose sum is σ = 191852388000. Its totient is φ = 27711111168.

The previous prime is 74543134691. The next prime is 74543134727. The reversal of 74543134720 is 2743134547.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74543134727) 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, 10308066 + ... + 10315294.

Almost surely, 2^74543134720 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 74543134720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95926194000).

74543134720 is an abundant number, since it is smaller than the sum of its proper divisors (117309253280).

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

74543134720 is a wasteful number, since it uses less digits than its factorization.

74543134720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7328 (or 7308 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 40.

The spelling of 74543134720 in words is "seventy-four billion, five hundred forty-three million, one hundred thirty-four thousand, seven hundred twenty".