1163561605 has 16 divisors (see below), whose sum is σ = 1459281024. Its totient is φ = 888972480.

The previous prime is 1163561599. The next prime is 1163561611. The reversal of 1163561605 is 5061653611.

It is an interprime number because it is at equal distance from previous prime (1163561599) and next prime (1163561611).

It is not a de Polignac number, because 1163561605 - 2¹¹ = 1163559557 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 68362 + ... + 83668.

It is an arithmetic number, because the mean of its divisors is an integer number (91205064).

Almost surely, 2^1163561605 is an apocalyptic number.

It is an amenable number.

1163561605 is a deficient number, since it is larger than the sum of its proper divisors (295719419).

1163561605 is a wasteful number, since it uses less digits than its factorization.

1163561605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15996.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 1163561605 is about 34111.0188209030. The cubic root of 1163561605 is about 1051.7918323983.

The spelling of 1163561605 in words is "one billion, one hundred sixty-three million, five hundred sixty-one thousand, six hundred five".