6409591015591 has 32 divisors (see below), whose sum is σ = 6888967652160. Its totient is φ = 5942280960000.

The previous prime is 6409591015579. The next prime is 6409591015613. The reversal of 6409591015591 is 1955101959046.

It is a cyclic number.

It is not a de Polignac number, because 6409591015591 - 2¹⁷ = 6409590884519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409591015501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529668441 + ... + 529680541.

It is an arithmetic number, because the mean of its divisors is an integer number (215280239130).

Almost surely, 2^{6409591015591} is an apocalyptic number.

6409591015591 is a deficient number, since it is larger than the sum of its proper divisors (479376636569).

6409591015591 is a wasteful number, since it uses less digits than its factorization.

6409591015591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13875.

The product of its (nonzero) digits is 2187000, while the sum is 55.

The spelling of 6409591015591 in words is "six trillion, four hundred nine billion, five hundred ninety-one million, fifteen thousand, five hundred ninety-one".