421370766978037 has 2 divisors, whose sum is σ = 421370766978038. Its totient is φ = 421370766978036.

The previous prime is 421370766978001. The next prime is 421370766978103. The reversal of 421370766978037 is 730879667073124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417983672733201 + 3387094244836 = 20444649^2 + 1840406^2 .

It is a cyclic number.

It is not a de Polignac number, because 421370766978037 - 2¹¹ = 421370766975989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421370766988037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210685383489018 + 210685383489019.

It is an arithmetic number, because the mean of its divisors is an integer number (210685383489019).

Almost surely, 2^{421370766978037} is an apocalyptic number.

It is an amenable number.

421370766978037 is a deficient number, since it is larger than the sum of its proper divisors (1).

421370766978037 is an equidigital number, since it uses as much as digits as its factorization.

421370766978037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448084224, while the sum is 70.

The spelling of 421370766978037 in words is "four hundred twenty-one trillion, three hundred seventy billion, seven hundred sixty-six million, nine hundred seventy-eight thousand, thirty-seven".