68389774994792 has 16 divisors (see below), whose sum is σ = 128230943969700. Its totient is φ = 34194856602880.

The previous prime is 68389774994767. The next prime is 68389774994819. The reversal of 68389774994792 is 29749947798386.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48715458285316 + 19674316709476 = 6979646^2 + 4435574^2 .

It is a super-2 number, since 2×68389774994792² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7519184 + ... + 13903872.

Almost surely, 2^{68389774994792} is an apocalyptic number.

It is an amenable number.

68389774994792 is a deficient number, since it is larger than the sum of its proper divisors (59841168974908).

68389774994792 is a wasteful number, since it uses less digits than its factorization.

68389774994792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723636 (or 7723632 counting only the distinct ones).

The product of its digits is 82959593472, while the sum is 92.

The spelling of 68389774994792 in words is "sixty-eight trillion, three hundred eighty-nine billion, seven hundred seventy-four million, nine hundred ninety-four thousand, seven hundred ninety-two".