164651481 has 16 divisors (see below), whose sum is σ = 249120000. Its totient is φ = 107431344.

The previous prime is 164651471. The next prime is 164651483. The reversal of 164651481 is 184156461.

164651481 is a `hidden beast` number, since 1 + 64 + 6 + 514 + 81 = 666.

It is not a de Polignac number, because 164651481 - 2¹⁷ = 164520409 is a prime.

It is a super-2 number, since 2×164651481² = 54220220390986722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164651483) by changing a digit.

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, 63606 + ... + 66143.

It is an arithmetic number, because the mean of its divisors is an integer number (15570000).

Almost surely, 2^164651481 is an apocalyptic number.

It is an amenable number.

164651481 is a deficient number, since it is larger than the sum of its proper divisors (84468519).

164651481 is a wasteful number, since it uses less digits than its factorization.

164651481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129805 (or 129799 counting only the distinct ones).

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

The square root of 164651481 is about 12831.6593237196. The cubic root of 164651481 is about 548.0942094322.

The spelling of 164651481 in words is "one hundred sixty-four million, six hundred fifty-one thousand, four hundred eighty-one".