1956811982753 has 2 divisors, whose sum is σ = 1956811982754. Its totient is φ = 1956811982752.

The previous prime is 1956811982717. The next prime is 1956811982809. The reversal of 1956811982753 is 3572891186591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1803831652624 + 152980330129 = 1343068^2 + 391127^2 .

It is an emirp because it is prime and its reverse (3572891186591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1956811982753 - 2¹⁸ = 1956811720609 is a prime.

It is a super-2 number, since 2×1956811982753² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1956811982753.

It is not a weakly prime, because it can be changed into another prime (1956811984753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978405991376 + 978405991377.

It is an arithmetic number, because the mean of its divisors is an integer number (978405991377).

Almost surely, 2^{1956811982753} is an apocalyptic number.

It is an amenable number.

1956811982753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956811982753 is an equidigital number, since it uses as much as digits as its factorization.

1956811982753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 65.

The spelling of 1956811982753 in words is "one trillion, nine hundred fifty-six billion, eight hundred eleven million, nine hundred eighty-two thousand, seven hundred fifty-three".