1163651272 has 32 divisors (see below), whose sum is σ = 2494756800. Its totient is φ = 498464064.

The previous prime is 1163651267. The next prime is 1163651273. The reversal of 1163651272 is 2721563611.

It is not an unprimeable number, because it can be changed into a prime (1163651273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155554 + ... + 162862.

It is an arithmetic number, because the mean of its divisors is an integer number (77961150).

Almost surely, 2^1163651272 is an apocalyptic number.

It is an amenable number.

1163651272 is an abundant number, since it is smaller than the sum of its proper divisors (1331105528).

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

1163651272 is a wasteful number, since it uses less digits than its factorization.

1163651272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10165 (or 10161 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 1163651272 is about 34112.3331362720. Note that the first 3 decimals coincide. The cubic root of 1163651272 is about 1051.8188496172.

The spelling of 1163651272 in words is "one billion, one hundred sixty-three million, six hundred fifty-one thousand, two hundred seventy-two".