1081655650513 has 2 divisors, whose sum is σ = 1081655650514. Its totient is φ = 1081655650512.

The previous prime is 1081655650477. The next prime is 1081655650571. The reversal of 1081655650513 is 3150565561801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 848799217809 + 232856432704 = 921303^2 + 482552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081655650513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1081655650013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540827825256 + 540827825257.

It is an arithmetic number, because the mean of its divisors is an integer number (540827825257).

Almost surely, 2^{1081655650513} is an apocalyptic number.

It is an amenable number.

1081655650513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081655650513 is an equidigital number, since it uses as much as digits as its factorization.

1081655650513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 1081655650513 in words is "one trillion, eighty-one billion, six hundred fifty-five million, six hundred fifty thousand, five hundred thirteen".