38691436633 has 2 divisors, whose sum is σ = 38691436634. Its totient is φ = 38691436632.

The previous prime is 38691436613. The next prime is 38691436661. The reversal of 38691436633 is 33663419683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32700212224 + 5991224409 = 180832^2 + 77403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38691436633 is a prime.

It is not a weakly prime, because it can be changed into another prime (38691436613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19345718316 + 19345718317.

It is an arithmetic number, because the mean of its divisors is an integer number (19345718317).

Almost surely, 2^38691436633 is an apocalyptic number.

It is an amenable number.

38691436633 is a deficient number, since it is larger than the sum of its proper divisors (1).

38691436633 is an equidigital number, since it uses as much as digits as its factorization.

38691436633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 52.

The spelling of 38691436633 in words is "thirty-eight billion, six hundred ninety-one million, four hundred thirty-six thousand, six hundred thirty-three".