420156444361 has 2 divisors, whose sum is σ = 420156444362. Its totient is φ = 420156444360.

The previous prime is 420156444341. The next prime is 420156444373. The reversal of 420156444361 is 163444651024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284046361600 + 136110082761 = 532960^2 + 368931^2 .

It is a cyclic number.

It is not a de Polignac number, because 420156444361 - 2¹⁷ = 420156313289 is a prime.

It is not a weakly prime, because it can be changed into another prime (420156444341) 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, 210078222180 + 210078222181.

It is an arithmetic number, because the mean of its divisors is an integer number (210078222181).

Almost surely, 2^420156444361 is an apocalyptic number.

It is an amenable number.

420156444361 is a deficient number, since it is larger than the sum of its proper divisors (1).

420156444361 is an equidigital number, since it uses as much as digits as its factorization.

420156444361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 420156444361 in words is "four hundred twenty billion, one hundred fifty-six million, four hundred forty-four thousand, three hundred sixty-one".