501616352421641 has 2 divisors, whose sum is σ = 501616352421642. Its totient is φ = 501616352421640.

The previous prime is 501616352421631. The next prime is 501616352421647. The reversal of 501616352421641 is 146124253616105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444248528457616 + 57367823964025 = 21077204^2 + 7574155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501616352421641 is a prime.

It is not a weakly prime, because it can be changed into another prime (501616352421647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250808176210820 + 250808176210821.

It is an arithmetic number, because the mean of its divisors is an integer number (250808176210821).

Almost surely, 2^{501616352421641} is an apocalyptic number.

It is an amenable number.

501616352421641 is a deficient number, since it is larger than the sum of its proper divisors (1).

501616352421641 is an equidigital number, since it uses as much as digits as its factorization.

501616352421641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 501616352421641 in words is "five hundred one trillion, six hundred sixteen billion, three hundred fifty-two million, four hundred twenty-one thousand, six hundred forty-one".