68641737713 has 4 divisors (see below), whose sum is σ = 68862451008. Its totient is φ = 68421024420.

The previous prime is 68641737707. The next prime is 68641737727. The reversal of 68641737713 is 31773714686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68641737713 - 2⁸ = 68641737457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68641737793) 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, 110356181 + ... + 110356802.

It is an arithmetic number, because the mean of its divisors is an integer number (17215612752).

Almost surely, 2^68641737713 is an apocalyptic number.

It is an amenable number.

68641737713 is a deficient number, since it is larger than the sum of its proper divisors (220713295).

68641737713 is a wasteful number, since it uses less digits than its factorization.

68641737713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220713294.

The product of its digits is 3556224, while the sum is 53.

The spelling of 68641737713 in words is "sixty-eight billion, six hundred forty-one million, seven hundred thirty-seven thousand, seven hundred thirteen".