164234535021 has 24 divisors (see below), whose sum is σ = 238089346560. Its totient is φ = 109092711456.

The previous prime is 164234535019. The next prime is 164234535053. The reversal of 164234535021 is 120535432461.

164234535021 is a `hidden beast` number, since 1 + 642 + 3 + 4 + 5 + 3 + 5 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 164234535021 - 2¹ = 164234535019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164234535001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2751136 + ... + 2810198.

It is an arithmetic number, because the mean of its divisors is an integer number (9920389440).

Almost surely, 2^164234535021 is an apocalyptic number.

It is an amenable number.

164234535021 is a deficient number, since it is larger than the sum of its proper divisors (73854811539).

164234535021 is a wasteful number, since it uses less digits than its factorization.

164234535021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60185 (or 60182 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 164234535021 its reverse (120535432461), we get a palindrome (284769967482).

The spelling of 164234535021 in words is "one hundred sixty-four billion, two hundred thirty-four million, five hundred thirty-five thousand, twenty-one".