164256816 has 20 divisors (see below), whose sum is σ = 424330232. Its totient is φ = 54752256.

The previous prime is 164256811. The next prime is 164256857. The reversal of 164256816 is 618652461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (164256811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1710961 + ... + 1711056.

Almost surely, 2^164256816 is an apocalyptic number.

164256816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164256816 is an abundant number, since it is smaller than the sum of its proper divisors (260073416).

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

164256816 is a wasteful number, since it uses less digits than its factorization.

164256816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422028 (or 3422022 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 164256816 is about 12816.2715327040. The cubic root of 164256816 is about 547.6559369006.

The spelling of 164256816 in words is "one hundred sixty-four million, two hundred fifty-six thousand, eight hundred sixteen".