36640038397 has 2 divisors, whose sum is σ = 36640038398. Its totient is φ = 36640038396.

The previous prime is 36640038271. The next prime is 36640038469. The reversal of 36640038397 is 79383004663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32375164761 + 4264873636 = 179931^2 + 65306^2 .

It is a cyclic number.

It is not a de Polignac number, because 36640038397 - 2⁷ = 36640038269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36640038397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36640038497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18320019198 + 18320019199.

It is an arithmetic number, because the mean of its divisors is an integer number (18320019199).

Almost surely, 2^36640038397 is an apocalyptic number.

It is an amenable number.

36640038397 is a deficient number, since it is larger than the sum of its proper divisors (1).

36640038397 is an equidigital number, since it uses as much as digits as its factorization.

36640038397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 36640038397 in words is "thirty-six billion, six hundred forty million, thirty-eight thousand, three hundred ninety-seven".