68829971831565 has 384 divisors, whose sum is σ = 138501135360000. Its totient is φ = 28998084132864.

The previous prime is 68829971831563. The next prime is 68829971831587. The reversal of 68829971831565 is 56513817992886.

It is not a de Polignac number, because 68829971831565 - 2¹ = 68829971831563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68829971831563) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 74090389021 + ... + 74090389949.

It is an arithmetic number, because the mean of its divisors is an integer number (360680040000).

Almost surely, 2^{68829971831565} is an apocalyptic number.

It is an amenable number.

68829971831565 is an abundant number, since it is smaller than the sum of its proper divisors (69671163528435).

68829971831565 is a wasteful number, since it uses less digits than its factorization.

68829971831565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609 (or 1602 counting only the distinct ones).

The product of its digits is 1567641600, while the sum is 78.

The spelling of 68829971831565 in words is "sixty-eight trillion, eight hundred twenty-nine billion, nine hundred seventy-one million, eight hundred thirty-one thousand, five hundred sixty-five".