681316138910 has 64 divisors (see below), whose sum is σ = 1378037574144. Its totient is φ = 240386832000.

The previous prime is 681316138873. The next prime is 681316138931. The reversal of 681316138910 is 19831613186.

It is a super-2 number, since 2×681316138910² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237272 + ... + 1191188.

It is an arithmetic number, because the mean of its divisors is an integer number (21531837096).

Almost surely, 2^681316138910 is an apocalyptic number.

681316138910 is an abundant number, since it is smaller than the sum of its proper divisors (696721435234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681316138910 is a wasteful number, since it uses less digits than its factorization.

681316138910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954129.

The product of its (nonzero) digits is 186624, while the sum is 47.

The spelling of 681316138910 in words is "six hundred eighty-one billion, three hundred sixteen million, one hundred thirty-eight thousand, nine hundred ten".