68739768993026 has 16 divisors (see below), whose sum is σ = 103708065620664. Its totient is φ = 34170422991744.

The previous prime is 68739768992977. The next prime is 68739768993037. The reversal of 68739768993026 is 62039986793786.

It is a Cunningham number, because it is equal to 8290945²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 68739768993025 + 1 = 8290945^2 + 1^2 .

It is an unprimeable number.

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, 12798116 + ... + 17357168.

Almost surely, 2^{68739768993026} is an apocalyptic number.

68739768993026 is a deficient number, since it is larger than the sum of its proper divisors (34968296627638).

68739768993026 is a wasteful number, since it uses less digits than its factorization.

68739768993026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602805.

The product of its (nonzero) digits is 8888527872, while the sum is 83.

The spelling of 68739768993026 in words is "sixty-eight trillion, seven hundred thirty-nine billion, seven hundred sixty-eight million, nine hundred ninety-three thousand, twenty-six".