555555161555633 has 2 divisors, whose sum is σ = 555555161555634. Its totient is φ = 555555161555632.

The previous prime is 555555161555531. The next prime is 555555161555699. The reversal of 555555161555633 is 336555161555555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 356902260908449 + 198652900647184 = 18891857^2 + 14094428^2 .

It is a cyclic number.

It is not a de Polignac number, because 555555161555633 - 2⁴⁰ = 554455649927857 is a prime.

It is a super-2 number, since 2×555555161555633² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 555555161555633.

It is not a weakly prime, because it can be changed into another prime (555555161525633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277777580777816 + 277777580777817.

It is an arithmetic number, because the mean of its divisors is an integer number (277777580777817).

Almost surely, 2^{555555161555633} is an apocalyptic number.

It is an amenable number.

555555161555633 is a deficient number, since it is larger than the sum of its proper divisors (1).

555555161555633 is an equidigital number, since it uses as much as digits as its factorization.

555555161555633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 632812500, while the sum is 65.

The spelling of 555555161555633 in words is "five hundred fifty-five trillion, five hundred fifty-five billion, one hundred sixty-one million, five hundred fifty-five thousand, six hundred thirty-three".