1543207005541 has 2 divisors, whose sum is σ = 1543207005542. Its totient is φ = 1543207005540.

The previous prime is 1543207005497. The next prime is 1543207005551. The reversal of 1543207005541 is 1455007023451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062659969316 + 480547036225 = 1030854^2 + 693215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1543207005541 - 2⁷ = 1543207005413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1543207005541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1543207005551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771603502770 + 771603502771.

It is an arithmetic number, because the mean of its divisors is an integer number (771603502771).

Almost surely, 2^{1543207005541} is an apocalyptic number.

It is an amenable number.

1543207005541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1543207005541 is an equidigital number, since it uses as much as digits as its factorization.

1543207005541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 1543207005541 in words is "one trillion, five hundred forty-three billion, two hundred seven million, five thousand, five hundred forty-one".