36640349897 has 2 divisors, whose sum is σ = 36640349898. Its totient is φ = 36640349896.

The previous prime is 36640349843. The next prime is 36640349903. The reversal of 36640349897 is 79894304663.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22961643961 + 13678705936 = 151531^2 + 116956^2 .

It is a cyclic number.

It is not a de Polignac number, because 36640349897 - 2¹⁰ = 36640348873 is a prime.

It is not a weakly prime, because it can be changed into another prime (36640343897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18320174948 + 18320174949.

It is an arithmetic number, because the mean of its divisors is an integer number (18320174949).

Almost surely, 2^36640349897 is an apocalyptic number.

It is an amenable number.

36640349897 is a deficient number, since it is larger than the sum of its proper divisors (1).

36640349897 is an equidigital number, since it uses as much as digits as its factorization.

36640349897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 36640349897 in words is "thirty-six billion, six hundred forty million, three hundred forty-nine thousand, eight hundred ninety-seven".