161110253464253 has 2 divisors, whose sum is σ = 161110253464254. Its totient is φ = 161110253464252.

The previous prime is 161110253464243. The next prime is 161110253464337. The reversal of 161110253464253 is 352464352011161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143648326974244 + 17461926490009 = 11985338^2 + 4178747^2 .

It is a cyclic number.

It is not a de Polignac number, because 161110253464253 - 2⁸ = 161110253463997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161110253464243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80555126732126 + 80555126732127.

It is an arithmetic number, because the mean of its divisors is an integer number (80555126732127).

Almost surely, 2^{161110253464253} is an apocalyptic number.

It is an amenable number.

161110253464253 is a deficient number, since it is larger than the sum of its proper divisors (1).

161110253464253 is an equidigital number, since it uses as much as digits as its factorization.

161110253464253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 161110253464253 in words is "one hundred sixty-one trillion, one hundred ten billion, two hundred fifty-three million, four hundred sixty-four thousand, two hundred fifty-three".