1187056727641 has 2 divisors, whose sum is σ = 1187056727642. Its totient is φ = 1187056727640.

The previous prime is 1187056727629. The next prime is 1187056727677. The reversal of 1187056727641 is 1467276507811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011625593616 + 175431134025 = 1005796^2 + 418845^2 .

It is an emirp because it is prime and its reverse (1467276507811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1187056727641 - 2¹¹ = 1187056725593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1187056727621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593528363820 + 593528363821.

It is an arithmetic number, because the mean of its divisors is an integer number (593528363821).

Almost surely, 2^{1187056727641} is an apocalyptic number.

It is an amenable number.

1187056727641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187056727641 is an equidigital number, since it uses as much as digits as its factorization.

1187056727641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 55.

The spelling of 1187056727641 in words is "one trillion, one hundred eighty-seven billion, fifty-six million, seven hundred twenty-seven thousand, six hundred forty-one".