6561438070701 has 16 divisors (see below), whose sum is σ = 9119137283264. Its totient is φ = 4192544530944.

The previous prime is 6561438070697. The next prime is 6561438070709. The reversal of 6561438070701 is 1070708341656.

It is not a de Polignac number, because 6561438070701 - 2² = 6561438070697 is a prime.

It is a super-2 number, since 2×6561438070701² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561438070709) 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 15 ways as a sum of consecutive naturals, for example, 441127300 + ... + 441142173.

It is an arithmetic number, because the mean of its divisors is an integer number (569946080204).

Almost surely, 2^{6561438070701} is an apocalyptic number.

It is an amenable number.

6561438070701 is a deficient number, since it is larger than the sum of its proper divisors (2557699212563).

6561438070701 is a wasteful number, since it uses less digits than its factorization.

6561438070701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882269580.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 6561438070701 in words is "six trillion, five hundred sixty-one billion, four hundred thirty-eight million, seventy thousand, seven hundred one".