1024375655561 has 2 divisors, whose sum is σ = 1024375655562. Its totient is φ = 1024375655560.

The previous prime is 1024375655539. The next prime is 1024375655617. The reversal of 1024375655561 is 1655565734201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597731543161 + 426644112400 = 773131^2 + 653180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024375655561 - 2⁶ = 1024375655497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1024375655531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512187827780 + 512187827781.

It is an arithmetic number, because the mean of its divisors is an integer number (512187827781).

Almost surely, 2^{1024375655561} is an apocalyptic number.

It is an amenable number.

1024375655561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024375655561 is an equidigital number, since it uses as much as digits as its factorization.

1024375655561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780000, while the sum is 50.

The spelling of 1024375655561 in words is "one trillion, twenty-four billion, three hundred seventy-five million, six hundred fifty-five thousand, five hundred sixty-one".