681097041913 has 8 divisors (see below), whose sum is σ = 696947584608. Its totient is φ = 665247002784.

The previous prime is 681097041847. The next prime is 681097041917. The reversal of 681097041913 is 319140790186.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681097041913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681097041917) 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, 5264781 + ... + 5392597.

It is an arithmetic number, because the mean of its divisors is an integer number (87118448076).

Almost surely, 2^681097041913 is an apocalyptic number.

It is an amenable number.

681097041913 is a deficient number, since it is larger than the sum of its proper divisors (15850542695).

681097041913 is a wasteful number, since it uses less digits than its factorization.

681097041913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251783.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 681097041913 in words is "six hundred eighty-one billion, ninety-seven million, forty-one thousand, nine hundred thirteen".