6731641310561 has 4 divisors (see below), whose sum is σ = 6874867721472. Its totient is φ = 6588414899652.

The previous prime is 6731641310533. The next prime is 6731641310573. The reversal of 6731641310561 is 1650131461376.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6731641310561 - 2³⁸ = 6456763403617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6731641319561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71613205385 + ... + 71613205478.

It is an arithmetic number, because the mean of its divisors is an integer number (1718716930368).

Almost surely, 2^{6731641310561} is an apocalyptic number.

It is an amenable number.

6731641310561 is a deficient number, since it is larger than the sum of its proper divisors (143226410911).

6731641310561 is a wasteful number, since it uses less digits than its factorization.

6731641310561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143226410910.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 6731641310561 in words is "six trillion, seven hundred thirty-one billion, six hundred forty-one million, three hundred ten thousand, five hundred sixty-one".