491229702653 has 4 divisors (see below), whose sum is σ = 491231120508. Its totient is φ = 491228284800.

The previous prime is 491229702641. The next prime is 491229702661. The reversal of 491229702653 is 356207922194.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 489030280249 + 2199422404 = 699307^2 + 46898^2 .

It is a cyclic number.

It is not a de Polignac number, because 491229702653 - 2⁶ = 491229702589 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 (491229702673) 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, 194675 + ... + 1010127.

It is an arithmetic number, because the mean of its divisors is an integer number (122807780127).

Almost surely, 2^491229702653 is an apocalyptic number.

It is an amenable number.

491229702653 is a deficient number, since it is larger than the sum of its proper divisors (1417855).

491229702653 is an equidigital number, since it uses as much as digits as its factorization.

491229702653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417854.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 491229702653 in words is "four hundred ninety-one billion, two hundred twenty-nine million, seven hundred two thousand, six hundred fifty-three".