164291520 has 112 divisors (see below), whose sum is σ = 531632160. Its totient is φ = 42971136.

The previous prime is 164291503. The next prime is 164291521. The reversal of 164291520 is 25192461.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164291521) 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, 49266 + ... + 52494.

Almost surely, 2^164291520 is an apocalyptic number.

164291520 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 164291520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265816080).

164291520 is an abundant number, since it is smaller than the sum of its proper divisors (367340640).

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

164291520 is a wasteful number, since it uses less digits than its factorization.

164291520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302 (or 3292 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 164291520 is about 12817.6253650979. The cubic root of 164291520 is about 547.6945035666.

The spelling of 164291520 in words is "one hundred sixty-four million, two hundred ninety-one thousand, five hundred twenty".