73911387648 has 320 divisors, whose sum is σ = 228642365952. Its totient is φ = 20782448640.

The previous prime is 73911387647. The next prime is 73911387659. The reversal of 73911387648 is 84678311937.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73911387647) 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, 317216140 + ... + 317216372.

Almost surely, 2^73911387648 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 73911387648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114321182976).

73911387648 is an abundant number, since it is smaller than the sum of its proper divisors (154730978304).

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

73911387648 is a wasteful number, since it uses less digits than its factorization.

73911387648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 589 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 57.

The spelling of 73911387648 in words is "seventy-three billion, nine hundred eleven million, three hundred eighty-seven thousand, six hundred forty-eight".