1161765385 has 16 divisors (see below), whose sum is σ = 1530198720. Its totient is φ = 839730240.

The previous prime is 1161765379. The next prime is 1161765419. The reversal of 1161765385 is 5835671611.

It is not a de Polignac number, because 1161765385 - 2¹³ = 1161757193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55830 + ... + 73759.

It is an arithmetic number, because the mean of its divisors is an integer number (95637420).

Almost surely, 2^1161765385 is an apocalyptic number.

It is an amenable number.

1161765385 is a deficient number, since it is larger than the sum of its proper divisors (368433335).

1161765385 is a wasteful number, since it uses less digits than its factorization.

1161765385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129768.

The product of its digits is 151200, while the sum is 43.

The square root of 1161765385 is about 34084.6796229626. The cubic root of 1161765385 is about 1051.2503276160.

The spelling of 1161765385 in words is "one billion, one hundred sixty-one million, seven hundred sixty-five thousand, three hundred eighty-five".