164244337921641 has 8 divisors (see below), whose sum is σ = 218994031296864. Its totient is φ = 109495434913760.

The previous prime is 164244337921619. The next prime is 164244337921649. The reversal of 164244337921641 is 146129733442461.

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 164244337921641 - 2¹⁰ = 164244337920617 is a prime.

It is a super-2 number, since 2×164244337921641² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164244337921649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197106780 + ... + 197938301.

It is an arithmetic number, because the mean of its divisors is an integer number (27374253912108).

Almost surely, 2^{164244337921641} is an apocalyptic number.

It is an amenable number.

164244337921641 is a deficient number, since it is larger than the sum of its proper divisors (54749693375223).

164244337921641 is a wasteful number, since it uses less digits than its factorization.

164244337921641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395183671.

The product of its digits is 20901888, while the sum is 57.

The spelling of 164244337921641 in words is "one hundred sixty-four trillion, two hundred forty-four billion, three hundred thirty-seven million, nine hundred twenty-one thousand, six hundred forty-one".