1163156864 has 64 divisors (see below), whose sum is σ = 2520020160. Its totient is φ = 532537344.

The previous prime is 1163156849. The next prime is 1163156867. The reversal of 1163156864 is 4686513611.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163156867) 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, 73289 + ... + 87735.

It is an arithmetic number, because the mean of its divisors is an integer number (39375315).

Almost surely, 2^1163156864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1163156864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260010080).

1163156864 is an abundant number, since it is smaller than the sum of its proper divisors (1356863296).

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

1163156864 is a wasteful number, since it uses less digits than its factorization.

1163156864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14515 (or 14503 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 1163156864 is about 34105.0856031765. The cubic root of 1163156864 is about 1051.6698641686.

The spelling of 1163156864 in words is "one billion, one hundred sixty-three million, one hundred fifty-six thousand, eight hundred sixty-four".