28953440450809 has 16 divisors (see below), whose sum is σ = 33275584235520. Its totient is φ = 24677790166800.

The previous prime is 28953440450807. The next prime is 28953440450819. The reversal of 28953440450809 is 90805404435982.

It is a cyclic number.

It is not a de Polignac number, because 28953440450809 - 2¹ = 28953440450807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28953440450807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39991584 + ... + 40709134.

It is an arithmetic number, because the mean of its divisors is an integer number (2079724014720).

Almost surely, 2^{28953440450809} is an apocalyptic number.

It is an amenable number.

28953440450809 is a deficient number, since it is larger than the sum of its proper divisors (4322143784711).

28953440450809 is a wasteful number, since it uses less digits than its factorization.

28953440450809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749940.

The product of its (nonzero) digits is 49766400, while the sum is 61.

The spelling of 28953440450809 in words is "twenty-eight trillion, nine hundred fifty-three billion, four hundred forty million, four hundred fifty thousand, eight hundred nine".