163538557 has 16 divisors (see below), whose sum is σ = 206722432. Its totient is φ = 125893440.

The previous prime is 163538539. The next prime is 163538561. The reversal of 163538557 is 755835361.

It is a cyclic number.

It is not a de Polignac number, because 163538557 - 2⁷ = 163538429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163538057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20919 + ... + 27652.

It is an arithmetic number, because the mean of its divisors is an integer number (12920152).

Almost surely, 2^163538557 is an apocalyptic number.

It is an amenable number.

163538557 is a deficient number, since it is larger than the sum of its proper divisors (43183875).

163538557 is a wasteful number, since it uses less digits than its factorization.

163538557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48628.

The product of its digits is 378000, while the sum is 43.

The square root of 163538557 is about 12788.2194616764. The cubic root of 163538557 is about 546.8565107959.

The spelling of 163538557 in words is "one hundred sixty-three million, five hundred thirty-eight thousand, five hundred fifty-seven".