495631820791 has 8 divisors (see below), whose sum is σ = 499050032400. Its totient is φ = 492214833792.

The previous prime is 495631820773. The next prime is 495631820857. The reversal of 495631820791 is 197028136594.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-495631820791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495631820741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513631 + ... + 1120303.

It is an arithmetic number, because the mean of its divisors is an integer number (62381254050).

It is a 1-persistent number, because it is pandigital, but 2⋅495631820791 = 991263641582 is not.

Almost surely, 2^495631820791 is an apocalyptic number.

495631820791 is a deficient number, since it is larger than the sum of its proper divisors (3418211609).

495631820791 is a wasteful number, since it uses less digits than its factorization.

495631820791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612305.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 495631820791 in words is "four hundred ninety-five billion, six hundred thirty-one million, eight hundred twenty thousand, seven hundred ninety-one".