164464623 has 12 divisors (see below), whose sum is σ = 238132440. Its totient is φ = 109378896.

The previous prime is 164464537. The next prime is 164464631. The reversal of 164464623 is 326464461.

164464623 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 646 + 2 + 3 = 666.

It is not a de Polignac number, because 164464623 - 2⁸ = 164464367 is a prime.

It is a super-2 number, since 2×164464623² = 54097224437064258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164464633) 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, 18036 + ... + 25577.

It is an arithmetic number, because the mean of its divisors is an integer number (19844370).

Almost surely, 2^164464623 is an apocalyptic number.

164464623 is a deficient number, since it is larger than the sum of its proper divisors (73667817).

164464623 is a wasteful number, since it uses less digits than its factorization.

164464623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44038 (or 44035 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 164464623 is about 12824.3761251766. The cubic root of 164464623 is about 547.8867924193.

The spelling of 164464623 in words is "one hundred sixty-four million, four hundred sixty-four thousand, six hundred twenty-three".