1161301765 has 16 divisors (see below), whose sum is σ = 1501516800. Its totient is φ = 857143872.

The previous prime is 1161301759. The next prime is 1161301787. The reversal of 1161301765 is 5671031611.

It is not a de Polignac number, because 1161301765 - 2⁵ = 1161301733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187996 + ... + 194074.

It is an arithmetic number, because the mean of its divisors is an integer number (93844800).

Almost surely, 2^1161301765 is an apocalyptic number.

It is an amenable number.

1161301765 is a deficient number, since it is larger than the sum of its proper divisors (340215035).

1161301765 is a wasteful number, since it uses less digits than its factorization.

1161301765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1161301765 is about 34077.8779415620. The cubic root of 1161301765 is about 1051.1104699105.

It can be divided in two parts, 116 and 1301765, that added together give a square (1301881 = 1141²).

The spelling of 1161301765 in words is "one billion, one hundred sixty-one million, three hundred one thousand, seven hundred sixty-five".