681191911227 has 16 divisors (see below), whose sum is σ = 913632952320. Its totient is φ = 451442644800.

The previous prime is 681191911199. The next prime is 681191911229. The reversal of 681191911227 is 722119191186.

It is not a de Polignac number, because 681191911227 - 2¹⁴ = 681191894843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681191911229) 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, 438799 + ... + 1246967.

It is an arithmetic number, because the mean of its divisors is an integer number (57102059520).

Almost surely, 2^681191911227 is an apocalyptic number.

681191911227 is a deficient number, since it is larger than the sum of its proper divisors (232441041093).

681191911227 is a wasteful number, since it uses less digits than its factorization.

681191911227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809834.

The product of its digits is 108864, while the sum is 48.

The spelling of 681191911227 in words is "six hundred eighty-one billion, one hundred ninety-one million, nine hundred eleven thousand, two hundred twenty-seven".