36878185649 has 2 divisors, whose sum is σ = 36878185650. Its totient is φ = 36878185648.

The previous prime is 36878185639. The next prime is 36878185699. The reversal of 36878185649 is 94658187863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32121600625 + 4756585024 = 179225^2 + 68968^2 .

It is an emirp because it is prime and its reverse (94658187863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36878185649 - 2⁴ = 36878185633 is a prime.

It is not a weakly prime, because it can be changed into another prime (36878185639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18439092824 + 18439092825.

It is an arithmetic number, because the mean of its divisors is an integer number (18439092825).

Almost surely, 2^36878185649 is an apocalyptic number.

It is an amenable number.

36878185649 is a deficient number, since it is larger than the sum of its proper divisors (1).

36878185649 is an equidigital number, since it uses as much as digits as its factorization.

36878185649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 65.

The spelling of 36878185649 in words is "thirty-six billion, eight hundred seventy-eight million, one hundred eighty-five thousand, six hundred forty-nine".