164505137673 has 4 divisors (see below), whose sum is σ = 219340183568. Its totient is φ = 109670091780.

The previous prime is 164505137669. The next prime is 164505137683. The reversal of 164505137673 is 376731505461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 164505137673 - 2² = 164505137669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164505137623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27417522943 + ... + 27417522948.

It is an arithmetic number, because the mean of its divisors is an integer number (54835045892).

Almost surely, 2^164505137673 is an apocalyptic number.

It is an amenable number.

164505137673 is a deficient number, since it is larger than the sum of its proper divisors (54835045895).

164505137673 is an equidigital number, since it uses as much as digits as its factorization.

164505137673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54835045894.

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 164505137673 in words is "one hundred sixty-four billion, five hundred five million, one hundred thirty-seven thousand, six hundred seventy-three".