1165561716 has 48 divisors (see below), whose sum is σ = 3047083200. Its totient is φ = 343653120.

The previous prime is 1165561703. The next prime is 1165561721. The reversal of 1165561716 is 6171655611.

It is a super-2 number, since 2×1165561716² = 2717068227609729312, which contains 22 as substring.

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, 114441 + ... + 124208.

It is an arithmetic number, because the mean of its divisors is an integer number (63480900).

Almost surely, 2^1165561716 is an apocalyptic number.

It is an amenable number.

1165561716 is an abundant number, since it is smaller than the sum of its proper divisors (1881521484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165561716 is a wasteful number, since it uses less digits than its factorization.

1165561716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238704 (or 238702 counting only the distinct ones).

The product of its digits is 37800, while the sum is 39.

The square root of 1165561716 is about 34140.3239000452. The cubic root of 1165561716 is about 1052.3941486444.

The spelling of 1165561716 in words is "one billion, one hundred sixty-five million, five hundred sixty-one thousand, seven hundred sixteen".