162273455921 has 2 divisors, whose sum is σ = 162273455922. Its totient is φ = 162273455920.

The previous prime is 162273455867. The next prime is 162273455951. The reversal of 162273455921 is 129554372261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151059704896 + 11213751025 = 388664^2 + 105895^2 .

It is a cyclic number.

It is not a de Polignac number, because 162273455921 - 2¹⁰ = 162273454897 is a prime.

It is not a weakly prime, because it can be changed into another prime (162273455951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81136727960 + 81136727961.

It is an arithmetic number, because the mean of its divisors is an integer number (81136727961).

Almost surely, 2^162273455921 is an apocalyptic number.

It is an amenable number.

162273455921 is a deficient number, since it is larger than the sum of its proper divisors (1).

162273455921 is an equidigital number, since it uses as much as digits as its factorization.

162273455921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The spelling of 162273455921 in words is "one hundred sixty-two billion, two hundred seventy-three million, four hundred fifty-five thousand, nine hundred twenty-one".