6561094507742 has 8 divisors (see below), whose sum is σ = 10181008719000. Its totient is φ = 3167424934744.

The previous prime is 6561094507741. The next prime is 6561094507757. The reversal of 6561094507742 is 2477054901656.

It is a happy number.

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

It is a super-2 number, since 2×6561094507742² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561094507741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56561159492 + ... + 56561159607.

It is an arithmetic number, because the mean of its divisors is an integer number (1272626089875).

Almost surely, 2^{6561094507742} is an apocalyptic number.

6561094507742 is a deficient number, since it is larger than the sum of its proper divisors (3619914211258).

6561094507742 is a wasteful number, since it uses less digits than its factorization.

6561094507742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113122319130.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 6561094507742 in words is "six trillion, five hundred sixty-one billion, ninety-four million, five hundred seven thousand, seven hundred forty-two".