1541781638713 has 2 divisors, whose sum is σ = 1541781638714. Its totient is φ = 1541781638712.

The previous prime is 1541781638671. The next prime is 1541781638723. The reversal of 1541781638713 is 3178361871451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947112400809 + 594669237904 = 973197^2 + 771148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1541781638713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1541781638723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770890819356 + 770890819357.

It is an arithmetic number, because the mean of its divisors is an integer number (770890819357).

Almost surely, 2^{1541781638713} is an apocalyptic number.

It is an amenable number.

1541781638713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541781638713 is an equidigital number, since it uses as much as digits as its factorization.

1541781638713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 55.

The spelling of 1541781638713 in words is "one trillion, five hundred forty-one billion, seven hundred eighty-one million, six hundred thirty-eight thousand, seven hundred thirteen".