1960913658581 has 2 divisors, whose sum is σ = 1960913658582. Its totient is φ = 1960913658580.

The previous prime is 1960913658533. The next prime is 1960913658659. The reversal of 1960913658581 is 1858563190691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1656860670481 + 304052988100 = 1287191^2 + 551410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1960913658581 - 2¹⁴ = 1960913642197 is a prime.

It is a super-2 number, since 2×1960913658581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1960913258581) 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, 980456829290 + 980456829291.

It is an arithmetic number, because the mean of its divisors is an integer number (980456829291).

Almost surely, 2^{1960913658581} is an apocalyptic number.

It is an amenable number.

1960913658581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1960913658581 is an equidigital number, since it uses as much as digits as its factorization.

1960913658581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13996800, while the sum is 62.

The spelling of 1960913658581 in words is "one trillion, nine hundred sixty billion, nine hundred thirteen million, six hundred fifty-eight thousand, five hundred eighty-one".