36643708397 has 2 divisors, whose sum is σ = 36643708398. Its totient is φ = 36643708396.

The previous prime is 36643708393. The next prime is 36643708417. The reversal of 36643708397 is 79380734663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36620945956 + 22762441 = 191366^2 + 4771^2 .

It is a cyclic number.

It is not a de Polignac number, because 36643708397 - 2² = 36643708393 is a prime.

It is a super-2 number, since 2×36643708397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36643708393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18321854198 + 18321854199.

It is an arithmetic number, because the mean of its divisors is an integer number (18321854199).

Almost surely, 2^36643708397 is an apocalyptic number.

It is an amenable number.

36643708397 is a deficient number, since it is larger than the sum of its proper divisors (1).

36643708397 is an equidigital number, since it uses as much as digits as its factorization.

36643708397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 36643708397 in words is "thirty-six billion, six hundred forty-three million, seven hundred eight thousand, three hundred ninety-seven".