1056565534321 has 16 divisors (see below), whose sum is σ = 1232065634688. Its totient is φ = 896344028800.

The previous prime is 1056565534319. The next prime is 1056565534357. The reversal of 1056565534321 is 1234355656501.

It is not a de Polignac number, because 1056565534321 - 2¹ = 1056565534319 is a prime.

It is a super-3 number, since 3×1056565534321³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056565534421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50918266 + ... + 50939011.

It is an arithmetic number, because the mean of its divisors is an integer number (77004102168).

Almost surely, 2^{1056565534321} is an apocalyptic number.

1056565534321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1056565534321 is a deficient number, since it is larger than the sum of its proper divisors (175500100367).

1056565534321 is a wasteful number, since it uses less digits than its factorization.

1056565534321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101857352.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 1056565534321 in words is "one trillion, fifty-six billion, five hundred sixty-five million, five hundred thirty-four thousand, three hundred twenty-one".