1161262065605 has 4 divisors (see below), whose sum is σ = 1393514478732. Its totient is φ = 929009652480.

The previous prime is 1161262065517. The next prime is 1161262065629. The reversal of 1161262065605 is 5065602621611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 333937204129 + 827324861476 = 577873^2 + 909574^2 .

It is not a de Polignac number, because 1161262065605 - 2²⁸ = 1160993630149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116126206556 + ... + 116126206565.

It is an arithmetic number, because the mean of its divisors is an integer number (348378619683).

Almost surely, 2^{1161262065605} is an apocalyptic number.

It is an amenable number.

1161262065605 is a deficient number, since it is larger than the sum of its proper divisors (232252413127).

1161262065605 is an equidigital number, since it uses as much as digits as its factorization.

1161262065605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232252413126.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 1161262065605 in words is "one trillion, one hundred sixty-one billion, two hundred sixty-two million, sixty-five thousand, six hundred five".