163455131315657 has 2 divisors, whose sum is σ = 163455131315658. Its totient is φ = 163455131315656.

The previous prime is 163455131315573. The next prime is 163455131315713. The reversal of 163455131315657 is 756513131554361.

163455131315657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (163455131315713) can be obtained adding 163455131315657 to its sum of digits (56).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161009172945721 + 2445958369936 = 12688939^2 + 1563956^2 .

It is a cyclic number.

It is not a de Polignac number, because 163455131315657 - 2¹² = 163455131311561 is a prime.

It is not a weakly prime, because it can be changed into another prime (163455131315057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81727565657828 + 81727565657829.

It is an arithmetic number, because the mean of its divisors is an integer number (81727565657829).

Almost surely, 2^{163455131315657} is an apocalyptic number.

It is an amenable number.

163455131315657 is a deficient number, since it is larger than the sum of its proper divisors (1).

163455131315657 is an equidigital number, since it uses as much as digits as its factorization.

163455131315657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010000, while the sum is 56.

The spelling of 163455131315657 in words is "one hundred sixty-three trillion, four hundred fifty-five billion, one hundred thirty-one million, three hundred fifteen thousand, six hundred fifty-seven".