1163605864 has 8 divisors (see below), whose sum is σ = 2181761010. Its totient is φ = 581802928.

The previous prime is 1163605841. The next prime is 1163605867. The reversal of 1163605864 is 4685063611.

It can be written as a sum of positive squares in only one way, i.e., 652393764 + 511212100 = 25542^2 + 22610^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1163605867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72725359 + ... + 72725374.

Almost surely, 2^1163605864 is an apocalyptic number.

It is an amenable number.

1163605864 is a deficient number, since it is larger than the sum of its proper divisors (1018155146).

1163605864 is a wasteful number, since it uses less digits than its factorization.

1163605864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145450739 (or 145450735 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1163605864 is about 34111.6675640462. The cubic root of 1163605864 is about 1051.8051680809.

The spelling of 1163605864 in words is "one billion, one hundred sixty-three million, six hundred five thousand, eight hundred sixty-four".