191677082641 has 24 divisors (see below), whose sum is σ = 217960724520. Its totient is φ = 168304308480.

The previous prime is 191677082629. The next prime is 191677082651. The reversal of 191677082641 is 146280776191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50059587600 + 141617495041 = 223740^2 + 376321^2 .

It is a de Polignac number, because none of the positive numbers 2^k-191677082641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191677082651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 457095 + ... + 769603.

It is an arithmetic number, because the mean of its divisors is an integer number (9081696855).

Almost surely, 2^191677082641 is an apocalyptic number.

191677082641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

191677082641 is a deficient number, since it is larger than the sum of its proper divisors (26283641879).

191677082641 is a wasteful number, since it uses less digits than its factorization.

191677082641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312705 (or 312694 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 191677082641 in words is "one hundred ninety-one billion, six hundred seventy-seven million, eighty-two thousand, six hundred forty-one".