3123256350491 has 2 divisors, whose sum is σ = 3123256350492. Its totient is φ = 3123256350490.

The previous prime is 3123256350419. The next prime is 3123256350493. The reversal of 3123256350491 is 1940536523213.

Together with previous prime (3123256350419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3123256350491 is a prime.

Together with 3123256350493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3123256350493) 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, 1561628175245 + 1561628175246.

It is an arithmetic number, because the mean of its divisors is an integer number (1561628175246).

Almost surely, 2^{3123256350491} is an apocalyptic number.

3123256350491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123256350491 is an equidigital number, since it uses as much as digits as its factorization.

3123256350491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 3123256350491 in words is "three trillion, one hundred twenty-three billion, two hundred fifty-six million, three hundred fifty thousand, four hundred ninety-one".