68917782494 has 48 divisors (see below), whose sum is σ = 116684903808. Its totient is φ = 30275406000.

The previous prime is 68917782487. The next prime is 68917782517. The reversal of 68917782494 is 49428771986.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68917782494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20442629 + ... + 20445999.

It is an arithmetic number, because the mean of its divisors is an integer number (2430935496).

Almost surely, 2^68917782494 is an apocalyptic number.

68917782494 is a deficient number, since it is larger than the sum of its proper divisors (47767121314).

68917782494 is a wasteful number, since it uses less digits than its factorization.

68917782494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413 (or 4382 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 65.

The spelling of 68917782494 in words is "sixty-eight billion, nine hundred seventeen million, seven hundred eighty-two thousand, four hundred ninety-four".