491446837237 has 2 divisors, whose sum is σ = 491446837238. Its totient is φ = 491446837236.

The previous prime is 491446837201. The next prime is 491446837253. The reversal of 491446837237 is 732738644194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362029652721 + 129417184516 = 601689^2 + 359746^2 .

It is a cyclic number.

It is not a de Polignac number, because 491446837237 - 2²⁷ = 491312619509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491446837267) 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 as a sum of consecutive naturals, namely, 245723418618 + 245723418619.

It is an arithmetic number, because the mean of its divisors is an integer number (245723418619).

Almost surely, 2^491446837237 is an apocalyptic number.

It is an amenable number.

491446837237 is a deficient number, since it is larger than the sum of its proper divisors (1).

491446837237 is an equidigital number, since it uses as much as digits as its factorization.

491446837237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 58.

The spelling of 491446837237 in words is "four hundred ninety-one billion, four hundred forty-six million, eight hundred thirty-seven thousand, two hundred thirty-seven".