1634663161 has 2 divisors, whose sum is σ = 1634663162. Its totient is φ = 1634663160.

The previous prime is 1634663159. The next prime is 1634663167. The reversal of 1634663161 is 1613664361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 926837136 + 707826025 = 30444^2 + 26605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634663161 - 2¹ = 1634663159 is a prime.

Together with 1634663159, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1634663161.

It is not a weakly prime, because it can be changed into another prime (1634663167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817331580 + 817331581.

It is an arithmetic number, because the mean of its divisors is an integer number (817331581).

Almost surely, 2^1634663161 is an apocalyptic number.

It is an amenable number.

1634663161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634663161 is an equidigital number, since it uses as much as digits as its factorization.

1634663161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 1634663161 is about 40430.9678464417. The cubic root of 1634663161 is about 1177.9931321620.

It can be divided in two parts, 16346 and 63161, that added together give a cube (79507 = 43³).

The spelling of 1634663161 in words is "one billion, six hundred thirty-four million, six hundred sixty-three thousand, one hundred sixty-one".