164531880 has 192 divisors, whose sum is σ = 576875520. Its totient is φ = 40550400.

The previous prime is 164531879. The next prime is 164531951. The reversal of 164531880 is 88135461.

164531880 is a `hidden beast` number, since 1 + 645 + 3 + 1 + 8 + 8 + 0 = 666.

164531880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256360 + ... + 257000.

It is an arithmetic number, because the mean of its divisors is an integer number (3004560).

Almost surely, 2^164531880 is an apocalyptic number.

164531880 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 164531880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288437760).

164531880 is an abundant number, since it is smaller than the sum of its proper divisors (412343640).

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

164531880 is a wasteful number, since it uses less digits than its factorization.

164531880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 164531880 is about 12826.9980899663. The cubic root of 164531880 is about 547.9614674453.

The spelling of 164531880 in words is "one hundred sixty-four million, five hundred thirty-one thousand, eight hundred eighty".