163686661055757 has 20 divisors (see below), whose sum is σ = 279450948681696. Its totient is φ = 93535234888680.

The previous prime is 163686661055747. The next prime is 163686661055767. The reversal of 163686661055757 is 757550166686361.

It is an interprime number because it is at equal distance from previous prime (163686661055747) and next prime (163686661055767).

It is not a de Polignac number, because 163686661055757 - 2¹⁶ = 163686660990221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163686661055707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 144344497719 + ... + 144344498852.

Almost surely, 2^{163686661055757} is an apocalyptic number.

It is an amenable number.

163686661055757 is a deficient number, since it is larger than the sum of its proper divisors (115764287625939).

163686661055757 is an equidigital number, since it uses as much as digits as its factorization.

163686661055757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288688996590 (or 288688996581 counting only the distinct ones).

The product of its (nonzero) digits is 1143072000, while the sum is 72.

The spelling of 163686661055757 in words is "one hundred sixty-three trillion, six hundred eighty-six billion, six hundred sixty-one million, fifty-five thousand, seven hundred fifty-seven".