68647611984 has 40 divisors (see below), whose sum is σ = 202673903040. Its totient is φ = 19613603328.

The previous prime is 68647611953. The next prime is 68647612003. The reversal of 68647611984 is 48911674686.

It is a super-2 number, since 2×68647611984² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102153849 + ... + 102154520.

It is an arithmetic number, because the mean of its divisors is an integer number (5066847576).

Almost surely, 2^68647611984 is an apocalyptic number.

It is an amenable number.

68647611984 is an abundant number, since it is smaller than the sum of its proper divisors (134026291056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68647611984 is a wasteful number, since it uses less digits than its factorization.

68647611984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204308387 (or 204308381 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 60.

The spelling of 68647611984 in words is "sixty-eight billion, six hundred forty-seven million, six hundred eleven thousand, nine hundred eighty-four".