71502717028 has 48 divisors (see below), whose sum is σ = 132718950000. Its totient is φ = 33646878720.

The previous prime is 71502717001. The next prime is 71502717067. The reversal of 71502717028 is 82071720517.

It can be written as a sum of positive squares in 8 ways, for example, as 27090526464 + 44412190564 = 164592^2 + 210742^2 .

It is a super-2 number, since 2×71502717028² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5934226 + ... + 5946262.

It is an arithmetic number, because the mean of its divisors is an integer number (2764978125).

Almost surely, 2^71502717028 is an apocalyptic number.

It is an amenable number.

71502717028 is a deficient number, since it is larger than the sum of its proper divisors (61216232972).

71502717028 is a wasteful number, since it uses less digits than its factorization.

71502717028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13360 (or 13358 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 40.

The spelling of 71502717028 in words is "seventy-one billion, five hundred two million, seven hundred seventeen thousand, twenty-eight".