53318785391 has 2 divisors, whose sum is σ = 53318785392. Its totient is φ = 53318785390.

The previous prime is 53318785343. The next prime is 53318785423. The reversal of 53318785391 is 19358781335.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53318785391 - 2²² = 53314591087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53318787391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26659392695 + 26659392696.

It is an arithmetic number, because the mean of its divisors is an integer number (26659392696).

Almost surely, 2^53318785391 is an apocalyptic number.

53318785391 is a deficient number, since it is larger than the sum of its proper divisors (1).

53318785391 is an equidigital number, since it uses as much as digits as its factorization.

53318785391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The spelling of 53318785391 in words is "fifty-three billion, three hundred eighteen million, seven hundred eighty-five thousand, three hundred ninety-one".