680321661515 has 8 divisors (see below), whose sum is σ = 818725210800. Its totient is φ = 542697851232.

The previous prime is 680321661511. The next prime is 680321661529. The reversal of 680321661515 is 515166123086.

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

It is a cyclic number.

It is not a de Polignac number, because 680321661515 - 2² = 680321661511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680321661511) 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, 194932829 + ... + 194936318.

It is an arithmetic number, because the mean of its divisors is an integer number (102340651350).

Almost surely, 2^680321661515 is an apocalyptic number.

680321661515 is a deficient number, since it is larger than the sum of its proper divisors (138403549285).

680321661515 is a wasteful number, since it uses less digits than its factorization.

680321661515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389869501.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 680321661515 in words is "six hundred eighty billion, three hundred twenty-one million, six hundred sixty-one thousand, five hundred fifteen".