71818403328 has 640 divisors, whose sum is σ = 254555136000. Its totient is φ = 19561512960.

The previous prime is 71818403309. The next prime is 71818403333. The reversal of 71818403328 is 82330481817.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266982778 + ... + 266983046.

It is an arithmetic number, because the mean of its divisors is an integer number (397742400).

Almost surely, 2^71818403328 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 71818403328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127277568000).

71818403328 is an abundant number, since it is smaller than the sum of its proper divisors (182736732672).

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

71818403328 is a wasteful number, since it uses less digits than its factorization.

71818403328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 71818403328 in words is "seventy-one billion, eight hundred eighteen million, four hundred three thousand, three hundred twenty-eight".