71052521044 has 12 divisors (see below), whose sum is σ = 124346166868. Its totient is φ = 35525044800.

The previous prime is 71052521041. The next prime is 71052521053. The reversal of 71052521044 is 44012525017.

It can be written as a sum of positive squares in 2 ways, for example, as 44610508944 + 26442012100 = 211212^2 + 162610^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71052520997 and 71052521015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71052521041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165417 + ... + 411664.

Almost surely, 2^71052521044 is an apocalyptic number.

It is an amenable number.

71052521044 is a deficient number, since it is larger than the sum of its proper divisors (53293645824).

71052521044 is a wasteful number, since it uses less digits than its factorization.

71052521044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607866 (or 607864 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 71052521044 in words is "seventy-one billion, fifty-two million, five hundred twenty-one thousand, forty-four".