164521332121641 has 32 divisors (see below), whose sum is σ = 245141880278400. Its totient is φ = 97277375116800.

The previous prime is 164521332121637. The next prime is 164521332121649. The reversal of 164521332121641 is 146121233125461.

It is not a de Polignac number, because 164521332121641 - 2² = 164521332121637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 164521332121593 and 164521332121602.

It is not an unprimeable number, because it can be changed into a prime (164521332121649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370030335 + ... + 370474683.

It is an arithmetic number, because the mean of its divisors is an integer number (7660683758700).

Almost surely, 2^{164521332121641} is an apocalyptic number.

164521332121641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164521332121641 is a deficient number, since it is larger than the sum of its proper divisors (80620548156759).

164521332121641 is a wasteful number, since it uses less digits than its factorization.

164521332121641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718057.

The product of its digits is 207360, while the sum is 42.

The spelling of 164521332121641 in words is "one hundred sixty-four trillion, five hundred twenty-one billion, three hundred thirty-two million, one hundred twenty-one thousand, six hundred forty-one".