164437557 has 16 divisors (see below), whose sum is σ = 231361920. Its totient is φ = 103676672.

The previous prime is 164437541. The next prime is 164437579. The reversal of 164437557 is 755734461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 164437557 - 2⁴ = 164437541 is a prime.

It is a super-4 number, since 4×164437557⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164430557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7248 + ... + 19529.

It is an arithmetic number, because the mean of its divisors is an integer number (14460120).

Almost surely, 2^164437557 is an apocalyptic number.

It is an amenable number.

164437557 is a deficient number, since it is larger than the sum of its proper divisors (66924363).

164437557 is a wasteful number, since it uses less digits than its factorization.

164437557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26892.

The product of its digits is 352800, while the sum is 42.

The square root of 164437557 is about 12823.3208257456. The cubic root of 164437557 is about 547.8567354639.

The spelling of 164437557 in words is "one hundred sixty-four million, four hundred thirty-seven thousand, five hundred fifty-seven".