68956168945 has 4 divisors (see below), whose sum is σ = 82747402740. Its totient is φ = 55164935152.

The previous prime is 68956168909. The next prime is 68956168949. The reversal of 68956168945 is 54986165986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32282386929 + 36673782016 = 179673^2 + 191504^2 .

It is a cyclic number.

It is not a de Polignac number, because 68956168945 - 2²⁷ = 68821951217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68956168949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6895616890 + ... + 6895616899.

It is an arithmetic number, because the mean of its divisors is an integer number (20686850685).

Almost surely, 2^68956168945 is an apocalyptic number.

It is an amenable number.

68956168945 is a deficient number, since it is larger than the sum of its proper divisors (13791233795).

68956168945 is a wasteful number, since it uses less digits than its factorization.

68956168945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13791233794.

The product of its digits is 111974400, while the sum is 67.

The spelling of 68956168945 in words is "sixty-eight billion, nine hundred fifty-six million, one hundred sixty-eight thousand, nine hundred forty-five".