71030787984 has 120 divisors (see below), whose sum is σ = 214184650680. Its totient is φ = 21844832256.

The previous prime is 71030787977. The next prime is 71030788007. The reversal of 71030787984 is 48978703017.

It can be written as a sum of positive squares in 4 ways, for example, as 30779193600 + 40251594384 = 175440^2 + 200628^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71030787984.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4314232 + ... + 4330664.

It is an arithmetic number, because the mean of its divisors is an integer number (1784872089).

Almost surely, 2^71030787984 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 71030787984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107092325340).

71030787984 is an abundant number, since it is smaller than the sum of its proper divisors (143153862696).

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

71030787984 is a wasteful number, since it uses less digits than its factorization.

71030787984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18769 (or 18760 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The spelling of 71030787984 in words is "seventy-one billion, thirty million, seven hundred eighty-seven thousand, nine hundred eighty-four".