136328637281 has 2 divisors, whose sum is σ = 136328637282. Its totient is φ = 136328637280.

The previous prime is 136328637223. The next prime is 136328637323. The reversal of 136328637281 is 182736823631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113917050256 + 22411587025 = 337516^2 + 149705^2 .

It is an emirp because it is prime and its reverse (182736823631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136328637281 is a prime.

It is a super-2 number, since 2×136328637281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136328637881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68164318640 + 68164318641.

It is an arithmetic number, because the mean of its divisors is an integer number (68164318641).

Almost surely, 2^136328637281 is an apocalyptic number.

It is an amenable number.

136328637281 is a deficient number, since it is larger than the sum of its proper divisors (1).

136328637281 is an equidigital number, since it uses as much as digits as its factorization.

136328637281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The spelling of 136328637281 in words is "one hundred thirty-six billion, three hundred twenty-eight million, six hundred thirty-seven thousand, two hundred eighty-one".