36681739931 has 2 divisors, whose sum is σ = 36681739932. Its totient is φ = 36681739930.

The previous prime is 36681739867. The next prime is 36681739933. The reversal of 36681739931 is 13993718663.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36681739931 - 2⁶ = 36681739867 is a prime.

It is a super-2 number, since 2×36681739931² (a number of 22 digits) contains 22 as substring.

Together with 36681739933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36681739933) 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, 18340869965 + 18340869966.

It is an arithmetic number, because the mean of its divisors is an integer number (18340869966).

Almost surely, 2^36681739931 is an apocalyptic number.

36681739931 is a deficient number, since it is larger than the sum of its proper divisors (1).

36681739931 is an equidigital number, since it uses as much as digits as its factorization.

36681739931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 56.

The spelling of 36681739931 in words is "thirty-six billion, six hundred eighty-one million, seven hundred thirty-nine thousand, nine hundred thirty-one".