71644872050 has 12 divisors (see below), whose sum is σ = 133259462106. Its totient is φ = 28657948800.

The previous prime is 71644872037. The next prime is 71644872109. The reversal of 71644872050 is 5027844617.

It can be written as a sum of positive squares in 3 ways, for example, as 40468966561 + 31175905489 = 201169^2 + 176567^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71644871992 and 71644872010.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 716448671 + ... + 716448770.

Almost surely, 2^71644872050 is an apocalyptic number.

71644872050 is a deficient number, since it is larger than the sum of its proper divisors (61614590056).

71644872050 is a wasteful number, since it uses less digits than its factorization.

71644872050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432897453 (or 1432897448 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 71644872050 in words is "seventy-one billion, six hundred forty-four million, eight hundred seventy-two thousand, fifty".