680954238638 has 8 divisors (see below), whose sum is σ = 1021460549832. Its totient is φ = 340467388696.

The previous prime is 680954238619. The next prime is 680954238677. The reversal of 680954238638 is 836832459086.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4777520 + ... + 4917987.

It is an arithmetic number, because the mean of its divisors is an integer number (127682568729).

Almost surely, 2^680954238638 is an apocalyptic number.

680954238638 is a deficient number, since it is larger than the sum of its proper divisors (340506311194).

680954238638 is a wasteful number, since it uses less digits than its factorization.

680954238638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730626.

The product of its (nonzero) digits is 59719680, while the sum is 62.

The spelling of 680954238638 in words is "six hundred eighty billion, nine hundred fifty-four million, two hundred thirty-eight thousand, six hundred thirty-eight".