681531658715 has 8 divisors (see below), whose sum is σ = 817852113600. Its totient is φ = 545215911552.

The previous prime is 681531658693. The next prime is 681531658733. The reversal of 681531658715 is 517856135186.

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

It is a cyclic number.

It is not a de Polignac number, because 681531658715 - 2¹⁶ = 681531593179 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850190 + ... + 1444259.

It is an arithmetic number, because the mean of its divisors is an integer number (102231514200).

Almost surely, 2^681531658715 is an apocalyptic number.

681531658715 is a deficient number, since it is larger than the sum of its proper divisors (136320454885).

681531658715 is a wasteful number, since it uses less digits than its factorization.

681531658715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353861.

The product of its digits is 6048000, while the sum is 56.

The spelling of 681531658715 in words is "six hundred eighty-one billion, five hundred thirty-one million, six hundred fifty-eight thousand, seven hundred fifteen".