450491988969 has 75 divisors (see below), whose sum is σ = 732819582365. Its totient is φ = 266676018840.

The previous prime is 450491988959. The next prime is 450491989061. The reversal of 450491988969 is 969889194054.

The square root of 450491988969 is 671187.

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

450491988969 is a `hidden beast` number, since 4 + 50 + 491 + 9 + 8 + 89 + 6 + 9 = 666.

It is not a de Polignac number, because 450491988969 - 2¹⁷ = 450491857897 is a prime.

It is a super-2 number, since 2×450491988969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 450491988897 and 450491988906.

It is not an unprimeable number, because it can be changed into a prime (450491988929) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 10476557862 + ... + 10476557904.

Almost surely, 2^450491988969 is an apocalyptic number.

450491988969 is the 671187-th square number.

450491988969 is the 335594-th centered octagonal number.

It is an amenable number.

450491988969 is a deficient number, since it is larger than the sum of its proper divisors (282327593396).

450491988969 is an frugal number, since it uses more digits than its factorization.

450491988969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 72.

The spelling of 450491988969 in words is "four hundred fifty billion, four hundred ninety-one million, nine hundred eighty-eight thousand, nine hundred sixty-nine".