162648470209 has 27 divisors (see below), whose sum is σ = 170054169987. Its totient is φ = 155562945216.

The previous prime is 162648470167. The next prime is 162648470249. The reversal of 162648470209 is 902074846261.

The square root of 162648470209 is 403297.

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

It can be written as a sum of positive squares in only one way, i.e., 2865996225 + 159782473984 = 53535^2 + 399728^2 .

It is not a de Polignac number, because 162648470209 - 2⁷ = 162648470081 is a prime.

It is a super-2 number, since 2×162648470209² (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 (162648470249) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1439366937 + ... + 1439367049.

Almost surely, 2^162648470209 is an apocalyptic number.

162648470209 is the 403297-th square number.

162648470209 is the 201649-th centered octagonal number.

It is an amenable number.

162648470209 is a deficient number, since it is larger than the sum of its proper divisors (7405699778).

162648470209 is an frugal number, since it uses more digits than its factorization.

162648470209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

Multiplying 162648470209 by its sum of digits (49), we get a square (7969775040241 = 2823079²).

The spelling of 162648470209 in words is "one hundred sixty-two billion, six hundred forty-eight million, four hundred seventy thousand, two hundred nine".