681100381138 has 16 divisors (see below), whose sum is σ = 1054098168480. Its totient is φ = 329853837600.

The previous prime is 681100381079. The next prime is 681100381183. The reversal of 681100381138 is 831183001186.

It is a self number, because there is not a number n which added to its sum of digits gives 681100381138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29866668 + ... + 29889463.

It is an arithmetic number, because the mean of its divisors is an integer number (65881135530).

Almost surely, 2^681100381138 is an apocalyptic number.

681100381138 is a deficient number, since it is larger than the sum of its proper divisors (372997787342).

681100381138 is a wasteful number, since it uses less digits than its factorization.

681100381138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59756313.

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 681100381138 in words is "six hundred eighty-one billion, one hundred million, three hundred eighty-one thousand, one hundred thirty-eight".