1161650011549 has 2 divisors, whose sum is σ = 1161650011550. Its totient is φ = 1161650011548.

The previous prime is 1161650011519. The next prime is 1161650011601. The reversal of 1161650011549 is 9451100561611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791112408025 + 370537603524 = 889445^2 + 608718^2 .

It is an emirp because it is prime and its reverse (9451100561611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161650011549 - 2⁵ = 1161650011517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161650011519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580825005774 + 580825005775.

It is an arithmetic number, because the mean of its divisors is an integer number (580825005775).

Almost surely, 2^{1161650011549} is an apocalyptic number.

It is an amenable number.

1161650011549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161650011549 is an equidigital number, since it uses as much as digits as its factorization.

1161650011549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 1161650011549 in words is "one trillion, one hundred sixty-one billion, six hundred fifty million, eleven thousand, five hundred forty-nine".