6561206757393 has 8 divisors (see below), whose sum is σ = 8748711232800. Its totient is φ = 4373920060128.

The previous prime is 6561206757383. The next prime is 6561206757397. The reversal of 6561206757393 is 3937576021656.

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

It is not a de Polignac number, because 6561206757393 - 2⁴⁰ = 5461695129617 is a prime.

It is a super-2 number, since 2×6561206757393² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6561206757397) 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 7 ways as a sum of consecutive naturals, for example, 54374223 + ... + 54494756.

It is an arithmetic number, because the mean of its divisors is an integer number (1093588904100).

Almost surely, 2^{6561206757393} is an apocalyptic number.

It is an amenable number.

6561206757393 is a deficient number, since it is larger than the sum of its proper divisors (2187504475407).

6561206757393 is a wasteful number, since it uses less digits than its factorization.

6561206757393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108889071.

The product of its (nonzero) digits is 42865200, while the sum is 60.

The spelling of 6561206757393 in words is "six trillion, five hundred sixty-one billion, two hundred six million, seven hundred fifty-seven thousand, three hundred ninety-three".