164662121647 has 2 divisors, whose sum is σ = 164662121648. Its totient is φ = 164662121646.

The previous prime is 164662121627. The next prime is 164662121671. The reversal of 164662121647 is 746121266461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164662121647 - 2¹¹ = 164662119599 is a prime.

It is a super-2 number, since 2×164662121647² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164662121597 and 164662121606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164662121627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82331060823 + 82331060824.

It is an arithmetic number, because the mean of its divisors is an integer number (82331060824).

Almost surely, 2^164662121647 is an apocalyptic number.

164662121647 is a deficient number, since it is larger than the sum of its proper divisors (1).

164662121647 is an equidigital number, since it uses as much as digits as its factorization.

164662121647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 46.

The spelling of 164662121647 in words is "one hundred sixty-four billion, six hundred sixty-two million, one hundred twenty-one thousand, six hundred forty-seven".