68113734744781 has 4 divisors (see below), whose sum is σ = 74305892448864. Its totient is φ = 61921577040700.

The previous prime is 68113734744739. The next prime is 68113734744821. The reversal of 68113734744781 is 18744743731186.

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 68113734744781 - 2¹¹ = 68113734742733 is a prime.

It is a super-2 number, since 2×68113734744781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68113734744281) 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, 3096078852025 + ... + 3096078852046.

It is an arithmetic number, because the mean of its divisors is an integer number (18576473112216).

Almost surely, 2^{68113734744781} is an apocalyptic number.

It is an amenable number.

68113734744781 is a deficient number, since it is larger than the sum of its proper divisors (6192157704083).

68113734744781 is a wasteful number, since it uses less digits than its factorization.

68113734744781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6192157704082.

The product of its digits is 75866112, while the sum is 64.

The spelling of 68113734744781 in words is "sixty-eight trillion, one hundred thirteen billion, seven hundred thirty-four million, seven hundred forty-four thousand, seven hundred eighty-one".