68463916640 has 96 divisors (see below), whose sum is σ = 190815657984. Its totient is φ = 22716126720.

The previous prime is 68463916637. The next prime is 68463916649. The reversal of 68463916640 is 4661936486.

It is a happy number.

68463916640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68463916649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951224 + ... + 1020663.

It is an arithmetic number, because the mean of its divisors is an integer number (1987663104).

Almost surely, 2^68463916640 is an apocalyptic number.

It is an amenable number.

68463916640 is an abundant number, since it is smaller than the sum of its proper divisors (122351741344).

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

68463916640 is a wasteful number, since it uses less digits than its factorization.

68463916640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971940 (or 1971932 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 68463916640 in words is "sixty-eight billion, four hundred sixty-three million, nine hundred sixteen thousand, six hundred forty".