1056345513161 has 2 divisors, whose sum is σ = 1056345513162. Its totient is φ = 1056345513160.

The previous prime is 1056345513127. The next prime is 1056345513163. The reversal of 1056345513161 is 1613155436501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1051535397136 + 4810116025 = 1025444^2 + 69355^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056345513161 - 2³⁸ = 781467606217 is a prime.

It is a super-2 number, since 2×1056345513161² (a number of 25 digits) contains 22 as substring.

Together with 1056345513163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1056345513163) 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 as a sum of consecutive naturals, namely, 528172756580 + 528172756581.

It is an arithmetic number, because the mean of its divisors is an integer number (528172756581).

Almost surely, 2^{1056345513161} is an apocalyptic number.

It is an amenable number.

1056345513161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056345513161 is an equidigital number, since it uses as much as digits as its factorization.

1056345513161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 1056345513161 in words is "one trillion, fifty-six billion, three hundred forty-five million, five hundred thirteen thousand, one hundred sixty-one".