628163387161 has 2 divisors, whose sum is σ = 628163387162. Its totient is φ = 628163387160.

The previous prime is 628163387153. The next prime is 628163387167. The reversal of 628163387161 is 161783361826.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616019347161 + 12144040000 = 784869^2 + 110200^2 .

It is a cyclic number.

It is not a de Polignac number, because 628163387161 - 2³ = 628163387153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628163387099 and 628163387108.

It is not a weakly prime, because it can be changed into another prime (628163387167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314081693580 + 314081693581.

It is an arithmetic number, because the mean of its divisors is an integer number (314081693581).

Almost surely, 2^628163387161 is an apocalyptic number.

It is an amenable number.

628163387161 is a deficient number, since it is larger than the sum of its proper divisors (1).

628163387161 is an equidigital number, since it uses as much as digits as its factorization.

628163387161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The spelling of 628163387161 in words is "six hundred twenty-eight billion, one hundred sixty-three million, three hundred eighty-seven thousand, one hundred sixty-one".