164537620 has 48 divisors (see below), whose sum is σ = 377249040. Its totient is φ = 59913216.

The previous prime is 164537617. The next prime is 164537629. The reversal of 164537620 is 26735461.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10876804 + 153660816 = 3298^2 + 12396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164537629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14646 + ... + 23314.

It is an arithmetic number, because the mean of its divisors is an integer number (7859355).

Almost surely, 2^164537620 is an apocalyptic number.

164537620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164537620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188624520).

164537620 is an abundant number, since it is smaller than the sum of its proper divisors (212711420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164537620 is a wasteful number, since it uses less digits than its factorization.

164537620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8764 (or 8762 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 164537620 is about 12827.2218348324. The cubic root of 164537620 is about 547.9678395888.

The spelling of 164537620 in words is "one hundred sixty-four million, five hundred thirty-seven thousand, six hundred twenty".