681351359181 has 16 divisors (see below), whose sum is σ = 909261628800. Its totient is φ = 453837772800.

The previous prime is 681351359159. The next prime is 681351359191. The reversal of 681351359181 is 181953153186.

It is not a de Polignac number, because 681351359181 - 2⁹ = 681351358669 is a prime.

It is a super-2 number, since 2×681351359181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681351359141) 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, 47305581 + ... + 47319981.

It is an arithmetic number, because the mean of its divisors is an integer number (56828851800).

Almost surely, 2^681351359181 is an apocalyptic number.

It is an amenable number.

681351359181 is a deficient number, since it is larger than the sum of its proper divisors (227910269619).

681351359181 is a wasteful number, since it uses less digits than its factorization.

681351359181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27076.

The product of its digits is 777600, while the sum is 51.

The spelling of 681351359181 in words is "six hundred eighty-one billion, three hundred fifty-one million, three hundred fifty-nine thousand, one hundred eighty-one".