1656366902849 has 2 divisors, whose sum is σ = 1656366902850. Its totient is φ = 1656366902848.

The previous prime is 1656366902821. The next prime is 1656366902857. The reversal of 1656366902849 is 9482096636561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1322976142849 + 333390760000 = 1150207^2 + 577400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1656366902849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1656366908849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828183451424 + 828183451425.

It is an arithmetic number, because the mean of its divisors is an integer number (828183451425).

Almost surely, 2^{1656366902849} is an apocalyptic number.

It is an amenable number.

1656366902849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656366902849 is an equidigital number, since it uses as much as digits as its factorization.

1656366902849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100776960, while the sum is 65.

The spelling of 1656366902849 in words is "one trillion, six hundred fifty-six billion, three hundred sixty-six million, nine hundred two thousand, eight hundred forty-nine".