191496828681 has 12 divisors (see below), whose sum is σ = 279939140208. Its totient is φ = 126126424824.

The previous prime is 191496828671. The next prime is 191496828701. The reversal of 191496828681 is 186828694191.

191496828681 is a `hidden beast` number, since 1 + 9 + 1 + 496 + 82 + 8 + 68 + 1 = 666.

It is not a de Polignac number, because 191496828681 - 2⁹ = 191496828169 is a prime.

It is a super-2 number, since 2×191496828681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191496828671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128176515 + ... + 128178008.

It is an arithmetic number, because the mean of its divisors is an integer number (23328261684).

Almost surely, 2^191496828681 is an apocalyptic number.

It is an amenable number.

191496828681 is a deficient number, since it is larger than the sum of its proper divisors (88442311527).

191496828681 is a wasteful number, since it uses less digits than its factorization.

191496828681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256354612 (or 256354609 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 63.

The spelling of 191496828681 in words is "one hundred ninety-one billion, four hundred ninety-six million, eight hundred twenty-eight thousand, six hundred eighty-one".