71812711048 has 32 divisors (see below), whose sum is σ = 145844659800. Its totient is φ = 32952734208.

The previous prime is 71812711007. The next prime is 71812711063. The reversal of 71812711048 is 84011721817.

It can be written as a sum of positive squares in 4 ways, for example, as 70204861444 + 1607849604 = 264962^2 + 40098^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71812711048.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977693 + ... + 2013676.

Almost surely, 2^71812711048 is an apocalyptic number.

It is an amenable number.

71812711048 is an abundant number, since it is smaller than the sum of its proper divisors (74031948752).

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

71812711048 is a wasteful number, since it uses less digits than its factorization.

71812711048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991561 (or 3991557 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 40.

The spelling of 71812711048 in words is "seventy-one billion, eight hundred twelve million, seven hundred eleven thousand, forty-eight".