36821864669 has 2 divisors, whose sum is σ = 36821864670. Its totient is φ = 36821864668.

The previous prime is 36821864627. The next prime is 36821864671. The reversal of 36821864669 is 96646812863.

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., 33393176644 + 3428688025 = 182738^2 + 58555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36821864669 is a prime.

It is a super-2 number, since 2×36821864669² (a number of 22 digits) contains 22 as substring.

Together with 36821864671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36821861669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18410932334 + 18410932335.

It is an arithmetic number, because the mean of its divisors is an integer number (18410932335).

Almost surely, 2^36821864669 is an apocalyptic number.

It is an amenable number.

36821864669 is a deficient number, since it is larger than the sum of its proper divisors (1).

36821864669 is an equidigital number, since it uses as much as digits as its factorization.

36821864669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 59.

The spelling of 36821864669 in words is "thirty-six billion, eight hundred twenty-one million, eight hundred sixty-four thousand, six hundred sixty-nine".