68641709516955 has 40 divisors (see below), whose sum is σ = 123051941284272. Its totient is φ = 36607328557632.

The previous prime is 68641709516923. The next prime is 68641709516981. The reversal of 68641709516955 is 55961590714686.

68641709516955 is a `hidden beast` number, since 6 + 8 + 6 + 4 + 17 + 0 + 9 + 516 + 95 + 5 = 666.

It is not a de Polignac number, because 68641709516955 - 2⁵ = 68641709516923 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5741604 + ... + 13047966.

Almost surely, 2^{68641709516955} is an apocalyptic number.

68641709516955 is a deficient number, since it is larger than the sum of its proper divisors (54410231767317).

68641709516955 is a wasteful number, since it uses less digits than its factorization.

68641709516955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329577 (or 7329568 counting only the distinct ones).

The product of its (nonzero) digits is 489888000, while the sum is 72.

The spelling of 68641709516955 in words is "sixty-eight trillion, six hundred forty-one billion, seven hundred nine million, five hundred sixteen thousand, nine hundred fifty-five".