164160381 has 48 divisors (see below), whose sum is σ = 290004480. Its totient is φ = 80229120.

The previous prime is 164160377. The next prime is 164160389. The reversal of 164160381 is 183061461.

It is not a de Polignac number, because 164160381 - 2² = 164160377 is a prime.

It is a super-2 number, since 2×164160381² = 53897261380130322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164160389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65530 + ... + 67988.

It is an arithmetic number, because the mean of its divisors is an integer number (6041760).

Almost surely, 2^164160381 is an apocalyptic number.

164160381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164160381 is a deficient number, since it is larger than the sum of its proper divisors (125844099).

164160381 is a wasteful number, since it uses less digits than its factorization.

164160381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 164160381 is about 12812.5087707287. The cubic root of 164160381 is about 547.5487398489.

The spelling of 164160381 in words is "one hundred sixty-four million, one hundred sixty thousand, three hundred eighty-one".