491825651953 has 2 divisors, whose sum is σ = 491825651954. Its totient is φ = 491825651952.

The previous prime is 491825651923. The next prime is 491825651957. The reversal of 491825651953 is 359156528194.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337197391969 + 154628259984 = 580687^2 + 393228^2 .

It is a cyclic number.

It is not a de Polignac number, because 491825651953 - 2⁵ = 491825651921 is a prime.

It is not a weakly prime, because it can be changed into another prime (491825651957) 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 as a sum of consecutive naturals, namely, 245912825976 + 245912825977.

It is an arithmetic number, because the mean of its divisors is an integer number (245912825977).

Almost surely, 2^491825651953 is an apocalyptic number.

It is an amenable number.

491825651953 is a deficient number, since it is larger than the sum of its proper divisors (1).

491825651953 is an equidigital number, since it uses as much as digits as its factorization.

491825651953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664000, while the sum is 58.

The spelling of 491825651953 in words is "four hundred ninety-one billion, eight hundred twenty-five million, six hundred fifty-one thousand, nine hundred fifty-three".