491911115053153 has 2 divisors, whose sum is σ = 491911115053154. Its totient is φ = 491911115053152.

The previous prime is 491911115053123. The next prime is 491911115053213. The reversal of 491911115053153 is 351350511119194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358432096883809 + 133479018169344 = 18932303^2 + 11553312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491911115053153 is a prime.

It is a super-2 number, since 2×491911115053153² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 491911115053097 and 491911115053106.

It is not a weakly prime, because it can be changed into another prime (491911115053123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245955557526576 + 245955557526577.

It is an arithmetic number, because the mean of its divisors is an integer number (245955557526577).

Almost surely, 2^{491911115053153} is an apocalyptic number.

It is an amenable number.

491911115053153 is a deficient number, since it is larger than the sum of its proper divisors (1).

491911115053153 is an equidigital number, since it uses as much as digits as its factorization.

491911115053153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 364500, while the sum is 49.

The spelling of 491911115053153 in words is "four hundred ninety-one trillion, nine hundred eleven billion, one hundred fifteen million, fifty-three thousand, one hundred fifty-three".