1541781639241 has 2 divisors, whose sum is σ = 1541781639242. Its totient is φ = 1541781639240.

The previous prime is 1541781639187. The next prime is 1541781639253. The reversal of 1541781639241 is 1429361871451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1541781639225 + 16 = 1241685^2 + 4^2 .

It is an emirp because it is prime and its reverse (1429361871451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1541781639241 - 2⁷ = 1541781639113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1541781639341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770890819620 + 770890819621.

It is an arithmetic number, because the mean of its divisors is an integer number (770890819621).

Almost surely, 2^{1541781639241} is an apocalyptic number.

It is an amenable number.

1541781639241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541781639241 is an equidigital number, since it uses as much as digits as its factorization.

1541781639241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The spelling of 1541781639241 in words is "one trillion, five hundred forty-one billion, seven hundred eighty-one million, six hundred thirty-nine thousand, two hundred forty-one".