320281449129369 has 216 divisors, whose sum is σ = 584875236221640. Its totient is φ = 167403241893888.

The previous prime is 320281449129281. The next prime is 320281449129373. The reversal of 320281449129369 is 963921944182023.

320281449129369 is a `hidden beast` number, since 3 + 2 + 0 + 2 + 8 + 1 + 449 + 129 + 3 + 69 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 135275206239369 + 185006242890000 = 11630787^2 + 13601700^2 .

It is not a de Polignac number, because 320281449129369 - 2²⁰ = 320281448080793 is a prime.

It is a super-2 number, since 2×320281449129369² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (320281449129569) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 101067038217 + ... + 101067041385.

Almost surely, 2^{320281449129369} is an apocalyptic number.

320281449129369 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

320281449129369 is a deficient number, since it is larger than the sum of its proper divisors (264593787092271).

320281449129369 is a wasteful number, since it uses less digits than its factorization.

320281449129369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4549 (or 4412 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 63.

The spelling of 320281449129369 in words is "three hundred twenty trillion, two hundred eighty-one billion, four hundred forty-nine million, one hundred twenty-nine thousand, three hundred sixty-nine".