163672557 has 8 divisors (see below), whose sum is σ = 218596800. Its totient is φ = 108931680.

The previous prime is 163672543. The next prime is 163672573. The reversal of 163672557 is 755276361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163672557 - 2¹⁰ = 163671533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163672507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43744 + ... + 47337.

It is an arithmetic number, because the mean of its divisors is an integer number (27324600).

Almost surely, 2^163672557 is an apocalyptic number.

It is an amenable number.

163672557 is a deficient number, since it is larger than the sum of its proper divisors (54924243).

163672557 is an equidigital number, since it uses as much as digits as its factorization.

163672557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91683.

The product of its digits is 264600, while the sum is 42.

The square root of 163672557 is about 12793.4575858131. The cubic root of 163672557 is about 547.0058308676.

The spelling of 163672557 in words is "one hundred sixty-three million, six hundred seventy-two thousand, five hundred fifty-seven".