71967974516 has 6 divisors (see below), whose sum is σ = 125943955410. Its totient is φ = 35983987256.

The previous prime is 71967974509. The next prime is 71967974543. The reversal of 71967974516 is 61547976917.

It can be written as a sum of positive squares in only one way, i.e., 61779090916 + 10188883600 = 248554^2 + 100940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8995996811 + ... + 8995996818.

It is an arithmetic number, because the mean of its divisors is an integer number (20990659235).

Almost surely, 2^71967974516 is an apocalyptic number.

It is an amenable number.

71967974516 is a deficient number, since it is larger than the sum of its proper divisors (53975980894).

71967974516 is a wasteful number, since it uses less digits than its factorization.

71967974516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17991993633 (or 17991993631 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 62.

The spelling of 71967974516 in words is "seventy-one billion, nine hundred sixty-seven million, nine hundred seventy-four thousand, five hundred sixteen".