36639212849 has 2 divisors, whose sum is σ = 36639212850. Its totient is φ = 36639212848.

The previous prime is 36639212791. The next prime is 36639212867. The reversal of 36639212849 is 94821293663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36236929600 + 402283249 = 190360^2 + 20057^2 .

It is a cyclic number.

It is not a de Polignac number, because 36639212849 - 2²⁰ = 36638164273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36639212849.

It is not a weakly prime, because it can be changed into another prime (36629212849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18319606424 + 18319606425.

It is an arithmetic number, because the mean of its divisors is an integer number (18319606425).

Almost surely, 2^36639212849 is an apocalyptic number.

It is an amenable number.

36639212849 is a deficient number, since it is larger than the sum of its proper divisors (1).

36639212849 is an equidigital number, since it uses as much as digits as its factorization.

36639212849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 53.

The spelling of 36639212849 in words is "thirty-six billion, six hundred thirty-nine million, two hundred twelve thousand, eight hundred forty-nine".