164154640 has 40 divisors (see below), whose sum is σ = 411020568. Its totient is φ = 60610560.

The previous prime is 164154631. The next prime is 164154671. The reversal of 164154640 is 46451461.

It can be written as a sum of positive squares in 4 ways, for example, as 7203856 + 156950784 = 2684^2 + 12528^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77881 + ... + 79960.

Almost surely, 2^164154640 is an apocalyptic number.

164154640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164154640 is an abundant number, since it is smaller than the sum of its proper divisors (246865928).

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

164154640 is a wasteful number, since it uses less digits than its factorization.

164154640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157867 (or 157861 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 164154640 is about 12812.2847298989. The cubic root of 164154640 is about 547.5423568351.

The spelling of 164154640 in words is "one hundred sixty-four million, one hundred fifty-four thousand, six hundred forty".