423784431657451 has 2 divisors, whose sum is σ = 423784431657452. Its totient is φ = 423784431657450.

The previous prime is 423784431657437. The next prime is 423784431657547. The reversal of 423784431657451 is 154756134487324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423784431657451 - 2⁹ = 423784431656939 is a prime.

It is not a weakly prime, because it can be changed into another prime (423784431657401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211892215828725 + 211892215828726.

It is an arithmetic number, because the mean of its divisors is an integer number (211892215828726).

Almost surely, 2^{423784431657451} is an apocalyptic number.

423784431657451 is a deficient number, since it is larger than the sum of its proper divisors (1).

423784431657451 is an equidigital number, since it uses as much as digits as its factorization.

423784431657451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270950400, while the sum is 64.

The spelling of 423784431657451 in words is "four hundred twenty-three trillion, seven hundred eighty-four billion, four hundred thirty-one million, six hundred fifty-seven thousand, four hundred fifty-one".