6491451477699 has 12 divisors (see below), whose sum is σ = 9385312357200. Its totient is φ = 4323586010544.

The previous prime is 6491451477683. The next prime is 6491451477769. The reversal of 6491451477699 is 9967741541946.

6491451477699 is a `hidden beast` number, since 6 + 4 + 9 + 14 + 51 + 477 + 6 + 99 = 666.

It is not a de Polignac number, because 6491451477699 - 2⁴ = 6491451477683 is a prime.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6491451477619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337348839 + ... + 337368080.

It is an arithmetic number, because the mean of its divisors is an integer number (782109363100).

Almost surely, 2^{6491451477699} is an apocalyptic number.

6491451477699 is a deficient number, since it is larger than the sum of its proper divisors (2893860879501).

6491451477699 is a wasteful number, since it uses less digits than its factorization.

6491451477699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674717994 (or 674717991 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 72.

The spelling of 6491451477699 in words is "six trillion, four hundred ninety-one billion, four hundred fifty-one million, four hundred seventy-seven thousand, six hundred ninety-nine".