16323553949 has 4 divisors (see below), whose sum is σ = 16391286780. Its totient is φ = 16255821120.

The previous prime is 16323553943. The next prime is 16323553979. The reversal of 16323553949 is 94935532361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94935532361 = 14281 ⋅6647681.

It can be written as a sum of positive squares in 2 ways, for example, as 14374331449 + 1949222500 = 119893^2 + 44150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16323553949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16323553897 and 16323553906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16323553943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33866054 + ... + 33866535.

It is an arithmetic number, because the mean of its divisors is an integer number (4097821695).

Almost surely, 2^16323553949 is an apocalyptic number.

It is an amenable number.

16323553949 is a deficient number, since it is larger than the sum of its proper divisors (67732831).

16323553949 is an equidigital number, since it uses as much as digits as its factorization.

16323553949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67732830.

The product of its digits is 2624400, while the sum is 50.

The spelling of 16323553949 in words is "sixteen billion, three hundred twenty-three million, five hundred fifty-three thousand, nine hundred forty-nine".