63173161657 has 2 divisors, whose sum is σ = 63173161658. Its totient is φ = 63173161656.

The previous prime is 63173161651. The next prime is 63173161673. The reversal of 63173161657 is 75616137136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58546577296 + 4626584361 = 241964^2 + 68019^2 .

It is a cyclic number.

It is not a de Polignac number, because 63173161657 - 2⁷ = 63173161529 is a prime.

It is not a weakly prime, because it can be changed into another prime (63173161651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31586580828 + 31586580829.

It is an arithmetic number, because the mean of its divisors is an integer number (31586580829).

Almost surely, 2^63173161657 is an apocalyptic number.

It is an amenable number.

63173161657 is a deficient number, since it is larger than the sum of its proper divisors (1).

63173161657 is an equidigital number, since it uses as much as digits as its factorization.

63173161657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The spelling of 63173161657 in words is "sixty-three billion, one hundred seventy-three million, one hundred sixty-one thousand, six hundred fifty-seven".