495921208321 has 32 divisors (see below), whose sum is σ = 627562874880. Its totient is φ = 380647209600.

The previous prime is 495921208301. The next prime is 495921208397. The reversal of 495921208321 is 123802129594.

It is not a de Polignac number, because 495921208321 - 2⁹ = 495921207809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495921208301) 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 31 ways as a sum of consecutive naturals, for example, 6132070 + ... + 6212416.

It is an arithmetic number, because the mean of its divisors is an integer number (19611339840).

Almost surely, 2^495921208321 is an apocalyptic number.

It is an amenable number.

495921208321 is a deficient number, since it is larger than the sum of its proper divisors (131641666559).

495921208321 is a wasteful number, since it uses less digits than its factorization.

495921208321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81565.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 495921208321 in words is "four hundred ninety-five billion, nine hundred twenty-one million, two hundred eight thousand, three hundred twenty-one".