68041690644 has 24 divisors (see below), whose sum is σ = 163054863328. Its totient is φ = 22067575200.

The previous prime is 68041690637. The next prime is 68041690663. The reversal of 68041690644 is 44609614086.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68041690593 and 68041690602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76623082 + ... + 76623969.

Almost surely, 2^68041690644 is an apocalyptic number.

It is an amenable number.

68041690644 is an abundant number, since it is smaller than the sum of its proper divisors (95013172684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68041690644 is a wasteful number, since it uses less digits than its factorization.

68041690644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153247095 (or 153247093 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 68041690644 in words is "sixty-eight billion, forty-one million, six hundred ninety thousand, six hundred forty-four".