36281881409 has 2 divisors, whose sum is σ = 36281881410. Its totient is φ = 36281881408.

The previous prime is 36281881397. The next prime is 36281881451. The reversal of 36281881409 is 90418818263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36072645184 + 209236225 = 189928^2 + 14465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36281881409 is a prime.

It is not a weakly prime, because it can be changed into another prime (36281881109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18140940704 + 18140940705.

It is an arithmetic number, because the mean of its divisors is an integer number (18140940705).

Almost surely, 2^36281881409 is an apocalyptic number.

It is an amenable number.

36281881409 is a deficient number, since it is larger than the sum of its proper divisors (1).

36281881409 is an equidigital number, since it uses as much as digits as its factorization.

36281881409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 36281881409 in words is "thirty-six billion, two hundred eighty-one million, eight hundred eighty-one thousand, four hundred nine".