1543241108261 has 2 divisors, whose sum is σ = 1543241108262. Its totient is φ = 1543241108260.

The previous prime is 1543241108251. The next prime is 1543241108273. The reversal of 1543241108261 is 1628011423451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 981387422500 + 561853685761 = 990650^2 + 749569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1543241108261 - 2⁶ = 1543241108197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1543241108231) 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, 771620554130 + 771620554131.

It is an arithmetic number, because the mean of its divisors is an integer number (771620554131).

Almost surely, 2^{1543241108261} is an apocalyptic number.

It is an amenable number.

1543241108261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1543241108261 is an equidigital number, since it uses as much as digits as its factorization.

1543241108261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 1543241108261 in words is "one trillion, five hundred forty-three billion, two hundred forty-one million, one hundred eight thousand, two hundred sixty-one".