681297810061 has 8 divisors (see below), whose sum is σ = 743510404800. Its totient is φ = 619131287040.

The previous prime is 681297809981. The next prime is 681297810097. The reversal of 681297810061 is 160018792186.

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 681297810061 - 2²³ = 681289421453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681297809987 and 681297810014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681297880061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11487001 + ... + 11546158.

It is an arithmetic number, because the mean of its divisors is an integer number (92938800600).

Almost surely, 2^681297810061 is an apocalyptic number.

It is an amenable number.

681297810061 is a deficient number, since it is larger than the sum of its proper divisors (62212594739).

681297810061 is a wasteful number, since it uses less digits than its factorization.

681297810061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23035859.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 681297810061 in words is "six hundred eighty-one billion, two hundred ninety-seven million, eight hundred ten thousand, sixty-one".