164231649 has 12 divisors (see below), whose sum is σ = 249709200. Its totient is φ = 103725144.

The previous prime is 164231647. The next prime is 164231651. The reversal of 164231649 is 946132461.

164231649 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 3 + 1 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (164231647) and next prime (164231651).

It is not a de Polignac number, because 164231649 - 2¹ = 164231647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164231647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480039 + ... + 480380.

It is an arithmetic number, because the mean of its divisors is an integer number (20809100).

Almost surely, 2^164231649 is an apocalyptic number.

164231649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

164231649 is a deficient number, since it is larger than the sum of its proper divisors (85477551).

164231649 is a wasteful number, since it uses less digits than its factorization.

164231649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960444 (or 960441 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 164231649 is about 12815.2896572805. The cubic root of 164231649 is about 547.6279653349.

The spelling of 164231649 in words is "one hundred sixty-four million, two hundred thirty-one thousand, six hundred forty-nine".