68634630681 has 8 divisors (see below), whose sum is σ = 91526655744. Its totient is φ = 45749513040.

The previous prime is 68634630679. The next prime is 68634630683. The reversal of 68634630681 is 18603643686.

It is an interprime number because it is at equal distance from previous prime (68634630679) and next prime (68634630683).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68634630681 - 2¹ = 68634630679 is a prime.

It is a super-3 number, since 3×68634630681³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68634630683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1703625 + ... + 1743446.

It is an arithmetic number, because the mean of its divisors is an integer number (11440831968).

Almost surely, 2^68634630681 is an apocalyptic number.

It is an amenable number.

68634630681 is a deficient number, since it is larger than the sum of its proper divisors (22892025063).

68634630681 is a wasteful number, since it uses less digits than its factorization.

68634630681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453711.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 68634630681 in words is "sixty-eight billion, six hundred thirty-four million, six hundred thirty thousand, six hundred eighty-one".