681313130810 has 32 divisors (see below), whose sum is σ = 1320791527440. Its totient is φ = 251544204288.

The previous prime is 681313130807. The next prime is 681313130821. The reversal of 681313130810 is 18031313186.

It can be written as a sum of positive squares in 8 ways, for example, as 328307226361 + 353005904449 = 572981^2 + 594143^2 .

It is a super-2 number, since 2×681313130810² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1765244 + ... + 2116296.

Almost surely, 2^681313130810 is an apocalyptic number.

681313130810 is a deficient number, since it is larger than the sum of its proper divisors (639478396630).

681313130810 is a wasteful number, since it uses less digits than its factorization.

681313130810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366002.

The product of its (nonzero) digits is 10368, while the sum is 35.

Adding to 681313130810 its reverse (18031313186), we get a palindrome (699344443996).

The spelling of 681313130810 in words is "six hundred eighty-one billion, three hundred thirteen million, one hundred thirty thousand, eight hundred ten".