164655362121 has 4 divisors (see below), whose sum is σ = 219540482832. Its totient is φ = 109770241412.

The previous prime is 164655362117. The next prime is 164655362141. The reversal of 164655362121 is 121263556461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121263556461 = 3 ⋅40421185487.

It is a cyclic number.

It is not a de Polignac number, because 164655362121 - 2² = 164655362117 is a prime.

It is a super-2 number, since 2×164655362121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164655362141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27442560351 + ... + 27442560356.

It is an arithmetic number, because the mean of its divisors is an integer number (54885120708).

Almost surely, 2^164655362121 is an apocalyptic number.

It is an amenable number.

164655362121 is a deficient number, since it is larger than the sum of its proper divisors (54885120711).

164655362121 is an equidigital number, since it uses as much as digits as its factorization.

164655362121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54885120710.

The product of its digits is 259200, while the sum is 42.

The spelling of 164655362121 in words is "one hundred sixty-four billion, six hundred fifty-five million, three hundred sixty-two thousand, one hundred twenty-one".