681172008010 has 32 divisors (see below), whose sum is σ = 1322423523792. Its totient is φ = 251129134080.

The previous prime is 681172007987. The next prime is 681172008017. The reversal of 681172008010 is 10800271186.

681172008010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 136508819841 + 544663188169 = 369471^2 + 738013^2 .

It is not an unprimeable number, because it can be changed into a prime (681172008017) 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, 3877599 + ... + 4049458.

Almost surely, 2^681172008010 is an apocalyptic number.

681172008010 is a deficient number, since it is larger than the sum of its proper divisors (641251515782).

681172008010 is a wasteful number, since it uses less digits than its factorization.

681172008010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7927738.

The product of its (nonzero) digits is 5376, while the sum is 34.

Adding to 681172008010 its reverse (10800271186), we get a palindrome (691972279196).

The spelling of 681172008010 in words is "six hundred eighty-one billion, one hundred seventy-two million, eight thousand, ten".