681240800723 has 16 divisors (see below), whose sum is σ = 786331157184. Its totient is φ = 578093913600.

The previous prime is 681240800683. The next prime is 681240800729. The reversal of 681240800723 is 327008042186.

It is not a de Polignac number, because 681240800723 - 2⁶ = 681240800659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681240800729) 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, 11435711 + ... + 11495127.

It is an arithmetic number, because the mean of its divisors is an integer number (49145697324).

Almost surely, 2^681240800723 is an apocalyptic number.

681240800723 is a deficient number, since it is larger than the sum of its proper divisors (105090356461).

681240800723 is a wasteful number, since it uses less digits than its factorization.

681240800723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75742.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 681240800723 in words is "six hundred eighty-one billion, two hundred forty million, eight hundred thousand, seven hundred twenty-three".