164784847969 has 9 divisors (see below), whose sum is σ = 191691802161. Its totient is φ = 141241719780.

The previous prime is 164784847963. The next prime is 164784847991. The reversal of 164784847969 is 969748487461.

The square root of 164784847969 is 405937.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 164784847969 - 2⁷ = 164784847841 is a prime.

It is a super-2 number, since 2×164784847969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164784847963) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2812564 + ... + 2870554.

It is an arithmetic number, because the mean of its divisors is an integer number (21299089129).

Almost surely, 2^164784847969 is an apocalyptic number.

164784847969 is the 405937-th square number.

164784847969 is the 202969-th centered octagonal number.

It is an amenable number.

164784847969 is a deficient number, since it is larger than the sum of its proper divisors (26906954192).

164784847969 is an frugal number, since it uses more digits than its factorization.

164784847969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115996 (or 57998 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 73.

The spelling of 164784847969 in words is "one hundred sixty-four billion, seven hundred eighty-four million, eight hundred forty-seven thousand, nine hundred sixty-nine".