40968607681 has 8 divisors (see below), whose sum is σ = 41016395520. Its totient is φ = 40920847968.

The previous prime is 40968607643. The next prime is 40968607739. The reversal of 40968607681 is 18670686904.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40968607681 is a prime.

It is a super-2 number, since 2×40968607681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40968604681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4317300 + ... + 4326778.

It is an arithmetic number, because the mean of its divisors is an integer number (5127049440).

Almost surely, 2^40968607681 is an apocalyptic number.

It is an amenable number.

40968607681 is a deficient number, since it is larger than the sum of its proper divisors (47787839).

40968607681 is a wasteful number, since it uses less digits than its factorization.

40968607681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14063.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 40968607681 in words is "forty billion, nine hundred sixty-eight million, six hundred seven thousand, six hundred eighty-one".