163126728904541 has 2 divisors, whose sum is σ = 163126728904542. Its totient is φ = 163126728904540.

The previous prime is 163126728904429. The next prime is 163126728904583. The reversal of 163126728904541 is 145409827621361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155205999748900 + 7920729155641 = 12458170^2 + 2814379^2 .

It is an emirp because it is prime and its reverse (145409827621361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163126728904541 - 2²² = 163126724710237 is a prime.

It is a super-2 number, since 2×163126728904541² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163126728904591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81563364452270 + 81563364452271.

It is an arithmetic number, because the mean of its divisors is an integer number (81563364452271).

It is a 1-persistent number, because it is pandigital, but 2⋅163126728904541 = 326253457809082 is not.

Almost surely, 2^{163126728904541} is an apocalyptic number.

It is an amenable number.

163126728904541 is a deficient number, since it is larger than the sum of its proper divisors (1).

163126728904541 is an equidigital number, since it uses as much as digits as its factorization.

163126728904541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 163126728904541 in words is "one hundred sixty-three trillion, one hundred twenty-six billion, seven hundred twenty-eight million, nine hundred four thousand, five hundred forty-one".