164043557 has 8 divisors (see below), whose sum is σ = 174073536. Its totient is φ = 154055872.

The previous prime is 164043553. The next prime is 164043559. The reversal of 164043557 is 755340461.

164043557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 164043557 - 2² = 164043553 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 (164043553) 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, 2393 + ... + 18270.

It is an arithmetic number, because the mean of its divisors is an integer number (21759192).

Almost surely, 2^164043557 is an apocalyptic number.

164043557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

164043557 is a deficient number, since it is larger than the sum of its proper divisors (10029979).

164043557 is a wasteful number, since it uses less digits than its factorization.

164043557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21147.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 164043557 is about 12807.9489771001. The cubic root of 164043557 is about 547.4188221560.

The spelling of 164043557 in words is "one hundred sixty-four million, forty-three thousand, five hundred fifty-seven".