423978740641 has 2 divisors, whose sum is σ = 423978740642. Its totient is φ = 423978740640.

The previous prime is 423978740629. The next prime is 423978740707. The reversal of 423978740641 is 146047879324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324895440016 + 99083300625 = 569996^2 + 314775^2 .

It is a cyclic number.

It is not a de Polignac number, because 423978740641 - 2⁵ = 423978740609 is a prime.

It is not a weakly prime, because it can be changed into another prime (423978744641) 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, 211989370320 + 211989370321.

It is an arithmetic number, because the mean of its divisors is an integer number (211989370321).

Almost surely, 2^423978740641 is an apocalyptic number.

It is an amenable number.

423978740641 is a deficient number, since it is larger than the sum of its proper divisors (1).

423978740641 is an equidigital number, since it uses as much as digits as its factorization.

423978740641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 423978740641 in words is "four hundred twenty-three billion, nine hundred seventy-eight million, seven hundred forty thousand, six hundred forty-one".