2166302563553 has 2 divisors, whose sum is σ = 2166302563554. Its totient is φ = 2166302563552.

The previous prime is 2166302563549. The next prime is 2166302563589. The reversal of 2166302563553 is 3553652036612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2054784636304 + 111517927249 = 1433452^2 + 333943^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166302563553 - 2² = 2166302563549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166302563498 and 2166302563507.

It is not a weakly prime, because it can be changed into another prime (2166302563853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083151281776 + 1083151281777.

It is an arithmetic number, because the mean of its divisors is an integer number (1083151281777).

Almost surely, 2^{2166302563553} is an apocalyptic number.

It is an amenable number.

2166302563553 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166302563553 is an equidigital number, since it uses as much as digits as its factorization.

2166302563553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 47.

The spelling of 2166302563553 in words is "two trillion, one hundred sixty-six billion, three hundred two million, five hundred sixty-three thousand, five hundred fifty-three".