215648043839 has 2 divisors, whose sum is σ = 215648043840. Its totient is φ = 215648043838.

The previous prime is 215648043829. The next prime is 215648043883. The reversal of 215648043839 is 938340846512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215648043839 - 2¹² = 215648039743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215648043829) 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, 107824021919 + 107824021920.

It is an arithmetic number, because the mean of its divisors is an integer number (107824021920).

Almost surely, 2^215648043839 is an apocalyptic number.

215648043839 is a deficient number, since it is larger than the sum of its proper divisors (1).

215648043839 is an equidigital number, since it uses as much as digits as its factorization.

215648043839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 215648043839 in words is "two hundred fifteen billion, six hundred forty-eight million, forty-three thousand, eight hundred thirty-nine".