164261221361635 has 8 divisors (see below), whose sum is σ = 197113604739840. Its totient is φ = 131408884352064.

The previous prime is 164261221361623. The next prime is 164261221361669. The reversal of 164261221361635 is 536163122162461.

It is a happy number.

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 164261221361635 - 2⁹ = 164261221361123 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3253315 + ... + 18414844.

It is an arithmetic number, because the mean of its divisors is an integer number (24639200592480).

Almost surely, 2^{164261221361635} is an apocalyptic number.

164261221361635 is a deficient number, since it is larger than the sum of its proper divisors (32852383378205).

164261221361635 is a wasteful number, since it uses less digits than its factorization.

164261221361635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23184317.

The product of its digits is 1866240, while the sum is 49.

The spelling of 164261221361635 in words is "one hundred sixty-four trillion, two hundred sixty-one billion, two hundred twenty-one million, three hundred sixty-one thousand, six hundred thirty-five".