164731086815 has 4 divisors (see below), whose sum is σ = 197677304184. Its totient is φ = 131784869448.

The previous prime is 164731086811. The next prime is 164731086823. The reversal of 164731086815 is 518680137461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 518680137461 = 293 ⋅1770239377.

It is a cyclic number.

It is not a de Polignac number, because 164731086815 - 2² = 164731086811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164731086811) 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, 16473108677 + ... + 16473108686.

It is an arithmetic number, because the mean of its divisors is an integer number (49419326046).

Almost surely, 2^164731086815 is an apocalyptic number.

164731086815 is a deficient number, since it is larger than the sum of its proper divisors (32946217369).

164731086815 is an equidigital number, since it uses as much as digits as its factorization.

164731086815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32946217368.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 164731086815 in words is "one hundred sixty-four billion, seven hundred thirty-one million, eighty-six thousand, eight hundred fifteen".