68509937571 has 8 divisors (see below), whose sum is σ = 91482316560. Its totient is φ = 45605425152.

The previous prime is 68509937537. The next prime is 68509937579. The reversal of 68509937571 is 17573990586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68509937571 - 2¹⁹ = 68509413283 is a prime.

It is a super-2 number, since 2×68509937571² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68509937579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16964286 + ... + 16968323.

It is an arithmetic number, because the mean of its divisors is an integer number (11435289570).

Almost surely, 2^68509937571 is an apocalyptic number.

68509937571 is a deficient number, since it is larger than the sum of its proper divisors (22972378989).

68509937571 is a wasteful number, since it uses less digits than its factorization.

68509937571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33933285.

The product of its (nonzero) digits is 14288400, while the sum is 60.

The spelling of 68509937571 in words is "sixty-eight billion, five hundred nine million, nine hundred thirty-seven thousand, five hundred seventy-one".