1163565642 has 16 divisors (see below), whose sum is σ = 2329600032. Its totient is φ = 387443760.

The previous prime is 1163565587. The next prime is 1163565671. The reversal of 1163565642 is 2465653611.

It is a self number, because there is not a number n which added to its sum of digits gives 1163565642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96709 + ... + 108072.

It is an arithmetic number, because the mean of its divisors is an integer number (145600002).

Almost surely, 2^1163565642 is an apocalyptic number.

1163565642 is an abundant number, since it is smaller than the sum of its proper divisors (1166034390).

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

1163565642 is a wasteful number, since it uses less digits than its factorization.

1163565642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205733.

The product of its digits is 129600, while the sum is 39.

The square root of 1163565642 is about 34111.0779952789. The cubic root of 1163565642 is about 1051.7930488011.

It can be divided in two parts, 11635 and 65642, that added together give a palindrome (77277).

The spelling of 1163565642 in words is "one billion, one hundred sixty-three million, five hundred sixty-five thousand, six hundred forty-two".