71012011816 has 8 divisors (see below), whose sum is σ = 133147522170. Its totient is φ = 35506005904.

The previous prime is 71012011813. The next prime is 71012011867. The reversal of 71012011816 is 61811021017.

It can be written as a sum of positive squares in only one way, i.e., 57386118916 + 13625892900 = 239554^2 + 116730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (71012011813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4438250731 + ... + 4438250746.

Almost surely, 2^71012011816 is an apocalyptic number.

It is an amenable number.

71012011816 is a deficient number, since it is larger than the sum of its proper divisors (62135510354).

71012011816 is a wasteful number, since it uses less digits than its factorization.

71012011816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876501483 (or 8876501479 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 28.

It can be divided in two parts, 7101201 and 1816, that added together give a palindrome (7103017).

The spelling of 71012011816 in words is "seventy-one billion, twelve million, eleven thousand, eight hundred sixteen".