611348215391 has 2 divisors, whose sum is σ = 611348215392. Its totient is φ = 611348215390.

The previous prime is 611348215273. The next prime is 611348215409. The reversal of 611348215391 is 193512843116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611348215391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611348214391) 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, 305674107695 + 305674107696.

It is an arithmetic number, because the mean of its divisors is an integer number (305674107696).

Almost surely, 2^611348215391 is an apocalyptic number.

611348215391 is a deficient number, since it is larger than the sum of its proper divisors (1).

611348215391 is an equidigital number, since it uses as much as digits as its factorization.

611348215391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The spelling of 611348215391 in words is "six hundred eleven billion, three hundred forty-eight million, two hundred fifteen thousand, three hundred ninety-one".