169255719649 has 27 divisors (see below), whose sum is σ = 182208234897. Its totient is φ = 157200260328.

The previous prime is 169255719643. The next prime is 169255719733. The reversal of 169255719649 is 946917552961.

The square root of 169255719649 is 411407.

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

169255719649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 169255719649 - 2³ = 169255719641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169255719641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 461187064 + ... + 461187430.

Almost surely, 2^169255719649 is an apocalyptic number.

169255719649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

169255719649 is the 411407-th square number.

169255719649 is the 205704-th centered octagonal number.

It is an amenable number.

169255719649 is a deficient number, since it is larger than the sum of its proper divisors (12952515248).

169255719649 is an frugal number, since it uses more digits than its factorization.

169255719649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 445 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 64.

Multiplying 169255719649 by its sum of digits (64), we get a square (10832366057536 = 3291256²).

The spelling of 169255719649 in words is "one hundred sixty-nine billion, two hundred fifty-five million, seven hundred nineteen thousand, six hundred forty-nine".