136587532381 has 2 divisors, whose sum is σ = 136587532382. Its totient is φ = 136587532380.

The previous prime is 136587532379. The next prime is 136587532397. The reversal of 136587532381 is 183235785631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111612787225 + 24974745156 = 334085^2 + 158034^2 .

It is a cyclic number.

It is not a de Polignac number, because 136587532381 - 2¹ = 136587532379 is a prime.

It is a super-2 number, since 2×136587532381² (a number of 23 digits) contains 22 as substring.

Together with 136587532379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136587532681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68293766190 + 68293766191.

It is an arithmetic number, because the mean of its divisors is an integer number (68293766191).

Almost surely, 2^136587532381 is an apocalyptic number.

It is an amenable number.

136587532381 is a deficient number, since it is larger than the sum of its proper divisors (1).

136587532381 is an equidigital number, since it uses as much as digits as its factorization.

136587532381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 52.

The spelling of 136587532381 in words is "one hundred thirty-six billion, five hundred eighty-seven million, five hundred thirty-two thousand, three hundred eighty-one".