1543149589909 has 2 divisors, whose sum is σ = 1543149589910. Its totient is φ = 1543149589908.

The previous prime is 1543149589907. The next prime is 1543149589931. The reversal of 1543149589909 is 9099859413451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871861050225 + 671288539684 = 933735^2 + 819322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1543149589909 - 2¹ = 1543149589907 is a prime.

Together with 1543149589907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1543149589907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771574794954 + 771574794955.

It is an arithmetic number, because the mean of its divisors is an integer number (771574794955).

Almost surely, 2^{1543149589909} is an apocalyptic number.

It is an amenable number.

1543149589909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1543149589909 is an equidigital number, since it uses as much as digits as its factorization.

1543149589909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62985600, while the sum is 67.

The spelling of 1543149589909 in words is "one trillion, five hundred forty-three billion, one hundred forty-nine million, five hundred eighty-nine thousand, nine hundred nine".