681323650015 has 8 divisors (see below), whose sum is σ = 817709347728. Its totient is φ = 544978274880.

The previous prime is 681323649997. The next prime is 681323650019. The reversal of 681323650015 is 510056323186.

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

It is not a de Polignac number, because 681323650015 - 2⁷ = 681323649887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681323650015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681323650019) 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, 10043457 + ... + 10111066.

It is an arithmetic number, because the mean of its divisors is an integer number (102213668466).

Almost surely, 2^681323650015 is an apocalyptic number.

681323650015 is a deficient number, since it is larger than the sum of its proper divisors (136385697713).

681323650015 is a wasteful number, since it uses less digits than its factorization.

681323650015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20161289.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 681323650015 in words is "six hundred eighty-one billion, three hundred twenty-three million, six hundred fifty thousand, fifteen".