135816186437 has 2 divisors, whose sum is σ = 135816186438. Its totient is φ = 135816186436.

The previous prime is 135816186419. The next prime is 135816186449. The reversal of 135816186437 is 734681618531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123644360161 + 12171826276 = 351631^2 + 110326^2 .

It is a cyclic number.

It is not a de Polignac number, because 135816186437 - 2¹⁶ = 135816120901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135816116437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67908093218 + 67908093219.

It is an arithmetic number, because the mean of its divisors is an integer number (67908093219).

Almost surely, 2^135816186437 is an apocalyptic number.

It is an amenable number.

135816186437 is a deficient number, since it is larger than the sum of its proper divisors (1).

135816186437 is an equidigital number, since it uses as much as digits as its factorization.

135816186437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 135816186437 in words is "one hundred thirty-five billion, eight hundred sixteen million, one hundred eighty-six thousand, four hundred thirty-seven".