6491437991067 has 8 divisors (see below), whose sum is σ = 8797140010000. Its totient is φ = 4256680649760.

The previous prime is 6491437991053. The next prime is 6491437991099. The reversal of 6491437991067 is 7601997341946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6491437991067 - 2⁸ = 6491437990811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6491437990989 and 6491437991007.

It is not an unprimeable number, because it can be changed into a prime (6491437991267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17736169192 + ... + 17736169557.

It is an arithmetic number, because the mean of its divisors is an integer number (1099642501250).

Almost surely, 2^{6491437991067} is an apocalyptic number.

6491437991067 is a deficient number, since it is larger than the sum of its proper divisors (2305702018933).

6491437991067 is a wasteful number, since it uses less digits than its factorization.

6491437991067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35472338813.

The product of its (nonzero) digits is 61725888, while the sum is 66.

The spelling of 6491437991067 in words is "six trillion, four hundred ninety-one billion, four hundred thirty-seven million, nine hundred ninety-one thousand, sixty-seven".