71211057316 has 63 divisors (see below), whose sum is σ = 145763777089. Its totient is φ = 30440569488.

The previous prime is 71211057301. The next prime is 71211057317. The reversal of 71211057316 is 61375011217.

It is a happy number.

The square root of 71211057316 is 266854.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16810159716 + 54400897600 = 129654^2 + 233240^2 .

It is a super-3 number, since 3×71211057316³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (71211057317) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 183061650 + ... + 183062038.

Almost surely, 2^71211057316 is an apocalyptic number.

71211057316 is the 266854-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71211057316

71211057316 is an abundant number, since it is smaller than the sum of its proper divisors (74552719773).

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

71211057316 is an frugal number, since it uses more digits than its factorization.

71211057316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 34.

The spelling of 71211057316 in words is "seventy-one billion, two hundred eleven million, fifty-seven thousand, three hundred sixteen".