495673890521 has 4 divisors (see below), whose sum is σ = 505026228132. Its totient is φ = 486321552912.

The previous prime is 495673890487. The next prime is 495673890533. The reversal of 495673890521 is 125098376594.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 418623234121 + 77050656400 = 647011^2 + 277580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495673890521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (495673890581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4676168726 + ... + 4676168831.

It is an arithmetic number, because the mean of its divisors is an integer number (126256557033).

It is a 1-persistent number, because it is pandigital, but 2⋅495673890521 = 991347781042 is not.

Almost surely, 2^495673890521 is an apocalyptic number.

It is an amenable number.

495673890521 is a deficient number, since it is larger than the sum of its proper divisors (9352337611).

495673890521 is an equidigital number, since it uses as much as digits as its factorization.

495673890521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9352337610.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 495673890521 in words is "four hundred ninety-five billion, six hundred seventy-three million, eight hundred ninety thousand, five hundred twenty-one".