164660633523 has 24 divisors (see below), whose sum is σ = 251871141600. Its totient is φ = 103301201664.

The previous prime is 164660633503. The next prime is 164660633551. The reversal of 164660633523 is 325336066461.

164660633523 is a `hidden beast` number, since 1 + 6 + 4 + 6 + 6 + 0 + 633 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 164660633523 - 2¹⁷ = 164660502451 is a prime.

It is a super-2 number, since 2×164660633523² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164660633503) 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, 1007073 + ... + 1159101.

It is an arithmetic number, because the mean of its divisors is an integer number (10494630900).

Almost surely, 2^164660633523 is an apocalyptic number.

164660633523 is a deficient number, since it is larger than the sum of its proper divisors (87210508077).

164660633523 is a wasteful number, since it uses less digits than its factorization.

164660633523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159131 (or 159128 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

Adding to 164660633523 its reverse (325336066461), we get a palindrome (489996699984).

The spelling of 164660633523 in words is "one hundred sixty-four billion, six hundred sixty million, six hundred thirty-three thousand, five hundred twenty-three".