164515035991 has 2 divisors, whose sum is σ = 164515035992. Its totient is φ = 164515035990.

The previous prime is 164515035959. The next prime is 164515036067. The reversal of 164515035991 is 199530515461.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (199530515461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164515035991 - 2⁵ = 164515035959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164515035931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82257517995 + 82257517996.

It is an arithmetic number, because the mean of its divisors is an integer number (82257517996).

Almost surely, 2^164515035991 is an apocalyptic number.

164515035991 is a deficient number, since it is larger than the sum of its proper divisors (1).

164515035991 is an equidigital number, since it uses as much as digits as its factorization.

164515035991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729000, while the sum is 49.

The spelling of 164515035991 in words is "one hundred sixty-four billion, five hundred fifteen million, thirty-five thousand, nine hundred ninety-one".