441201421561 has 2 divisors, whose sum is σ = 441201421562. Its totient is φ = 441201421560.

The previous prime is 441201421501. The next prime is 441201421571. The reversal of 441201421561 is 165124102144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336957030400 + 104244391161 = 580480^2 + 322869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-441201421561 is a prime.

It is not a weakly prime, because it can be changed into another prime (441201421501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220600710780 + 220600710781.

It is an arithmetic number, because the mean of its divisors is an integer number (220600710781).

Almost surely, 2^441201421561 is an apocalyptic number.

It is an amenable number.

441201421561 is a deficient number, since it is larger than the sum of its proper divisors (1).

441201421561 is an equidigital number, since it uses as much as digits as its factorization.

441201421561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 441201421561 in words is "four hundred forty-one billion, two hundred one million, four hundred twenty-one thousand, five hundred sixty-one".