5243961953491 has 2 divisors, whose sum is σ = 5243961953492. Its totient is φ = 5243961953490.

The previous prime is 5243961953479. The next prime is 5243961953497. The reversal of 5243961953491 is 1943591693425.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5243961953491 is a prime.

It is a super-2 number, since 2×5243961953491² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5243961953497) 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, 2621980976745 + 2621980976746.

It is an arithmetic number, because the mean of its divisors is an integer number (2621980976746).

Almost surely, 2^{5243961953491} is an apocalyptic number.

5243961953491 is a deficient number, since it is larger than the sum of its proper divisors (1).

5243961953491 is an equidigital number, since it uses as much as digits as its factorization.

5243961953491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31492800, while the sum is 61.

The spelling of 5243961953491 in words is "five trillion, two hundred forty-three billion, nine hundred sixty-one million, nine hundred fifty-three thousand, four hundred ninety-one".