680726381505 has 16 divisors (see below), whose sum is σ = 1089504682944. Its totient is φ = 362939912640.

The previous prime is 680726381501. The next prime is 680726381509. The reversal of 680726381505 is 505183627086.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (680726381501) and next prime (680726381509).

It is not a de Polignac number, because 680726381505 - 2² = 680726381501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680726381501) 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, 7085539 + ... + 7180968.

It is an arithmetic number, because the mean of its divisors is an integer number (68094042684).

Almost surely, 2^680726381505 is an apocalyptic number.

It is an amenable number.

680726381505 is a deficient number, since it is larger than the sum of its proper divisors (408778301439).

680726381505 is a wasteful number, since it uses less digits than its factorization.

680726381505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14269696.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 680726381505 in words is "six hundred eighty billion, seven hundred twenty-six million, three hundred eighty-one thousand, five hundred five".