11812557839 has 2 divisors, whose sum is σ = 11812557840. Its totient is φ = 11812557838.

The previous prime is 11812557817. The next prime is 11812557863. The reversal of 11812557839 is 93875521811.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11812557839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11812559839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5906278919 + 5906278920.

It is an arithmetic number, because the mean of its divisors is an integer number (5906278920).

Almost surely, 2^11812557839 is an apocalyptic number.

11812557839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11812557839 is an equidigital number, since it uses as much as digits as its factorization.

11812557839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 50.

The spelling of 11812557839 in words is "eleven billion, eight hundred twelve million, five hundred fifty-seven thousand, eight hundred thirty-nine".