163401557 has 8 divisors (see below), whose sum is σ = 178474080. Its totient is φ = 148365360.

The previous prime is 163401547. The next prime is 163401559. The reversal of 163401557 is 755104361.

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

It is not a de Polignac number, because 163401557 - 2⁴ = 163401541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163401559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803 + ... + 18095.

It is an arithmetic number, because the mean of its divisors is an integer number (22309260).

Almost surely, 2^163401557 is an apocalyptic number.

It is an amenable number.

163401557 is a deficient number, since it is larger than the sum of its proper divisors (15072523).

163401557 is a wasteful number, since it uses less digits than its factorization.

163401557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18163.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 163401557 is about 12782.8618470200. The cubic root of 163401557 is about 546.7037633874.

The spelling of 163401557 in words is "one hundred sixty-three million, four hundred one thousand, five hundred fifty-seven".