68581477616 has 40 divisors (see below), whose sum is σ = 133609283280. Its totient is φ = 34101817344.

The previous prime is 68581477609. The next prime is 68581477619. The reversal of 68581477616 is 61677418586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68581477619) 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, 12312080 + ... + 12317648.

It is an arithmetic number, because the mean of its divisors is an integer number (3340232082).

Almost surely, 2^68581477616 is an apocalyptic number.

It is an amenable number.

68581477616 is a deficient number, since it is larger than the sum of its proper divisors (65027805664).

68581477616 is a wasteful number, since it uses less digits than its factorization.

68581477616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9681 (or 9675 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 59.

The spelling of 68581477616 in words is "sixty-eight billion, five hundred eighty-one million, four hundred seventy-seven thousand, six hundred sixteen".