164608032021 has 16 divisors (see below), whose sum is σ = 233671733568. Its totient is φ = 102712838400.

The previous prime is 164608031933. The next prime is 164608032023. The reversal of 164608032021 is 120230806461.

It is not a de Polignac number, because 164608032021 - 2¹⁵ = 164607999253 is a prime.

It is a super-2 number, since 2×164608032021² (a number of 23 digits) 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 (164608032023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8906815 + ... + 8925276.

It is an arithmetic number, because the mean of its divisors is an integer number (14604483348).

Almost surely, 2^164608032021 is an apocalyptic number.

It is an amenable number.

164608032021 is a deficient number, since it is larger than the sum of its proper divisors (69063701547).

164608032021 is a wasteful number, since it uses less digits than its factorization.

164608032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17832292.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 164608032021 its reverse (120230806461), we get a palindrome (284838838482).

The spelling of 164608032021 in words is "one hundred sixty-four billion, six hundred eight million, thirty-two thousand, twenty-one".