68623616394 has 16 divisors (see below), whose sum is σ = 152496925440. Its totient is φ = 22874538780.

The previous prime is 68623616393. The next prime is 68623616443. The reversal of 68623616394 is 49361632686.

68623616394 is a `hidden beast` number, since 6 + 8 + 6 + 236 + 16 + 394 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1270807711 = 68623616394 / (6 + 8 + 6 + 2 + 3 + 6 + 1 + 6 + 3 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 68623616394.

It is not an unprimeable number, because it can be changed into a prime (68623616393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635403802 + ... + 635403909.

It is an arithmetic number, because the mean of its divisors is an integer number (9531057840).

Almost surely, 2^68623616394 is an apocalyptic number.

68623616394 is an abundant number, since it is smaller than the sum of its proper divisors (83873309046).

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

68623616394 is a wasteful number, since it uses less digits than its factorization.

68623616394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270807722 (or 1270807716 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 68623616394 in words is "sixty-eight billion, six hundred twenty-three million, six hundred sixteen thousand, three hundred ninety-four".