164687138497 has 8 divisors (see below), whose sum is σ = 188273327616. Its totient is φ = 141115813152.

The previous prime is 164687138477. The next prime is 164687138503. The reversal of 164687138497 is 794831786461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164687138497 - 2²³ = 164678749889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164687138477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3692188 + ... + 3736525.

It is an arithmetic number, because the mean of its divisors is an integer number (23534165952).

Almost surely, 2^164687138497 is an apocalyptic number.

It is an amenable number.

164687138497 is a deficient number, since it is larger than the sum of its proper divisors (23586189119).

164687138497 is an equidigital number, since it uses as much as digits as its factorization.

164687138497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7431887.

The product of its digits is 48771072, while the sum is 64.

The spelling of 164687138497 in words is "one hundred sixty-four billion, six hundred eighty-seven million, one hundred thirty-eight thousand, four hundred ninety-seven".