164477395465 has 4 divisors (see below), whose sum is σ = 197372874564. Its totient is φ = 131581916368.

The previous prime is 164477395463. The next prime is 164477395477. The reversal of 164477395465 is 564593774461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564593774461 = 4391 ⋅128579771.

It can be written as a sum of positive squares in 2 ways, for example, as 90795550329 + 73681845136 = 301323^2 + 271444^2 .

It is a cyclic number.

It is not a de Polignac number, because 164477395465 - 2¹ = 164477395463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164477395463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16447739542 + ... + 16447739551.

It is an arithmetic number, because the mean of its divisors is an integer number (49343218641).

Almost surely, 2^164477395465 is an apocalyptic number.

It is an amenable number.

164477395465 is a deficient number, since it is larger than the sum of its proper divisors (32895479099).

164477395465 is an equidigital number, since it uses as much as digits as its factorization.

164477395465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32895479098.

The product of its digits is 76204800, while the sum is 61.

The spelling of 164477395465 in words is "one hundred sixty-four billion, four hundred seventy-seven million, three hundred ninety-five thousand, four hundred sixty-five".