1163161656 has 24 divisors (see below), whose sum is σ = 3150229680. Its totient is φ = 387720528.

The previous prime is 1163161651. The next prime is 1163161663. The reversal of 1163161656 is 6561613611.

1163161656 is a `hidden beast` number, since 1 + 1 + 6 + 31 + 616 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1163161656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163161651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8077440 + ... + 8077583.

It is an arithmetic number, because the mean of its divisors is an integer number (131259570).

Almost surely, 2^1163161656 is an apocalyptic number.

It is an amenable number.

1163161656 is an abundant number, since it is smaller than the sum of its proper divisors (1987068024).

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

1163161656 is a wasteful number, since it uses less digits than its factorization.

1163161656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16155035 (or 16155028 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1163161656 is about 34105.1558565564. The cubic root of 1163161656 is about 1051.6713083977.

The spelling of 1163161656 in words is "one billion, one hundred sixty-three million, one hundred sixty-one thousand, six hundred fifty-six".