6491188654 has 16 divisors (see below), whose sum is σ = 9759366000. Its totient is φ = 3238076800.

The previous prime is 6491188637. The next prime is 6491188663. The reversal of 6491188654 is 4568811946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2316054 + ... + 2318854.

It is an arithmetic number, because the mean of its divisors is an integer number (609960375).

Almost surely, 2^6491188654 is an apocalyptic number.

6491188654 is a deficient number, since it is larger than the sum of its proper divisors (3268177346).

6491188654 is a wasteful number, since it uses less digits than its factorization.

6491188654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5075.

The product of its digits is 1658880, while the sum is 52.

The square root of 6491188654 is about 80567.9133030017. The cubic root of 6491188654 is about 1865.4119035482.

The spelling of 6491188654 in words is "six billion, four hundred ninety-one million, one hundred eighty-eight thousand, six hundred fifty-four".