164895540 has 48 divisors (see below), whose sum is σ = 472452288. Its totient is φ = 42948864.

The previous prime is 164895517. The next prime is 164895553. The reversal of 164895540 is 45598461.

It is a super-2 number, since 2×164895540² = 54381078223783200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164895492 and 164895501.

It is a congruent number.

It is an unprimeable number.

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, 29377 + ... + 34536.

It is an arithmetic number, because the mean of its divisors is an integer number (9842756).

Almost surely, 2^164895540 is an apocalyptic number.

164895540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164895540 is an abundant number, since it is smaller than the sum of its proper divisors (307556748).

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

164895540 is a wasteful number, since it uses less digits than its factorization.

164895540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63968 (or 63966 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 164895540 is about 12841.1658349232. The cubic root of 164895540 is about 548.3648847699.

The spelling of 164895540 in words is "one hundred sixty-four million, eight hundred ninety-five thousand, five hundred forty".