67642474453 has 2 divisors, whose sum is σ = 67642474454. Its totient is φ = 67642474452.

The previous prime is 67642474379. The next prime is 67642474481. The reversal of 67642474453 is 35447424676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53760450769 + 13882023684 = 231863^2 + 117822^2 .

It is a cyclic number.

It is not a de Polignac number, because 67642474453 - 2¹⁷ = 67642343381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67642474453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67642474553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33821237226 + 33821237227.

It is an arithmetic number, because the mean of its divisors is an integer number (33821237227).

Almost surely, 2^67642474453 is an apocalyptic number.

It is an amenable number.

67642474453 is a deficient number, since it is larger than the sum of its proper divisors (1).

67642474453 is an equidigital number, since it uses as much as digits as its factorization.

67642474453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13547520, while the sum is 52.

The spelling of 67642474453 in words is "sixty-seven billion, six hundred forty-two million, four hundred seventy-four thousand, four hundred fifty-three".