68578390724 has 24 divisors (see below), whose sum is σ = 121398149880. Its totient is φ = 33893443584.

The previous prime is 68578390723. The next prime is 68578390739. The reversal of 68578390724 is 42709387586.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4169026624 + 64409364100 = 64568^2 + 253790^2 .

It is not an unprimeable number, because it can be changed into a prime (68578390723) 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, 1194092 + ... + 1250204.

It is an arithmetic number, because the mean of its divisors is an integer number (5058256245).

Almost surely, 2^68578390724 is an apocalyptic number.

It is an amenable number.

68578390724 is a deficient number, since it is larger than the sum of its proper divisors (52819759156).

68578390724 is a wasteful number, since it uses less digits than its factorization.

68578390724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59639 (or 59637 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 68578390724 in words is "sixty-eight billion, five hundred seventy-eight million, three hundred ninety thousand, seven hundred twenty-four".