6491761304187 has 18 divisors (see below), whose sum is σ = 9194896205404. Its totient is φ = 4073214921920.

The previous prime is 6491761304159. The next prime is 6491761304207. The reversal of 6491761304187 is 7814031671946.

It is not a de Polignac number, because 6491761304187 - 2⁶ = 6491761304123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491761304887) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 74979112 + ... + 75065642.

Almost surely, 2^{6491761304187} is an apocalyptic number.

6491761304187 is a deficient number, since it is larger than the sum of its proper divisors (2703134901217).

6491761304187 is an frugal number, since it uses more digits than its factorization.

6491761304187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173099 (or 86551 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 6491761304187 in words is "six trillion, four hundred ninety-one billion, seven hundred sixty-one million, three hundred four thousand, one hundred eighty-seven".