680136231993 has 16 divisors (see below), whose sum is σ = 938217582720. Its totient is φ = 437742806144.

The previous prime is 680136231989. The next prime is 680136232057. The reversal of 680136231993 is 399132631086.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 680136231993 - 2² = 680136231989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680136233993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431005 + ... + 1243397.

It is an arithmetic number, because the mean of its divisors is an integer number (58638598920).

Almost surely, 2^680136231993 is an apocalyptic number.

It is an amenable number.

680136231993 is a deficient number, since it is larger than the sum of its proper divisors (258081350727).

680136231993 is a wasteful number, since it uses less digits than its factorization.

680136231993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822048.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 680136231993 in words is "six hundred eighty billion, one hundred thirty-six million, two hundred thirty-one thousand, nine hundred ninety-three".