681730366031 has 16 divisors (see below), whose sum is σ = 835736348160. Its totient is φ = 547208317920.

The previous prime is 681730366021. The next prime is 681730366033. The reversal of 681730366031 is 130663037186.

It is not a de Polignac number, because 681730366031 - 2¹⁴ = 681730349647 is a prime.

It is a super-2 number, since 2×681730366031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681730366033) 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, 103634651 + ... + 103641228.

It is an arithmetic number, because the mean of its divisors is an integer number (52233521760).

Almost surely, 2^681730366031 is an apocalyptic number.

681730366031 is a deficient number, since it is larger than the sum of its proper divisors (154005982129).

681730366031 is a wasteful number, since it uses less digits than its factorization.

681730366031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207275926.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 681730366031 in words is "six hundred eighty-one billion, seven hundred thirty million, three hundred sixty-six thousand, thirty-one".