71817282730251 has 12 divisors (see below), whose sum is σ = 105943225588512. Its totient is φ = 46859503625136.

The previous prime is 71817282730231. The next prime is 71817282730313. The reversal of 71817282730251 is 15203728271817.

71817282730251 is a `hidden beast` number, since 7 + 1 + 8 + 1 + 7 + 282 + 7 + 302 + 51 = 666.

It is not a de Polignac number, because 71817282730251 - 2³⁰ = 71816208988427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71817282730231) 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 11 ways as a sum of consecutive naturals, for example, 84890404696 + ... + 84890405541.

It is an arithmetic number, because the mean of its divisors is an integer number (8828602132376).

Almost surely, 2^{71817282730251} is an apocalyptic number.

71817282730251 is a deficient number, since it is larger than the sum of its proper divisors (34125942858261).

71817282730251 is a wasteful number, since it uses less digits than its factorization.

71817282730251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169780810290 (or 169780810287 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 54.

The spelling of 71817282730251 in words is "seventy-one trillion, eight hundred seventeen billion, two hundred eighty-two million, seven hundred thirty thousand, two hundred fifty-one".