68727968464 has 40 divisors (see below), whose sum is σ = 136868517632. Its totient is φ = 33414232320.

The previous prime is 68727968461. The next prime is 68727968467. The reversal of 68727968464 is 46486972786.

It is an interprime number because it is at equal distance from previous prime (68727968461) and next prime (68727968467).

It is a self number, because there is not a number n which added to its sum of digits gives 68727968464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68727968461) 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, 70557 + ... + 377404.

Almost surely, 2^68727968464 is an apocalyptic number.

It is an amenable number.

68727968464 is a deficient number, since it is larger than the sum of its proper divisors (68140549168).

68727968464 is a wasteful number, since it uses less digits than its factorization.

68727968464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448235 (or 448229 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 67.

The spelling of 68727968464 in words is "sixty-eight billion, seven hundred twenty-seven million, nine hundred sixty-eight thousand, four hundred sixty-four".