1153565664 has 48 divisors (see below), whose sum is σ = 3047437008. Its totient is φ = 382067712.

The previous prime is 1153565597. The next prime is 1153565689. The reversal of 1153565664 is 4665653511.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23197 + ... + 53340.

It is an arithmetic number, because the mean of its divisors is an integer number (63488271).

Almost surely, 2^1153565664 is an apocalyptic number.

It is an amenable number.

1153565664 is an abundant number, since it is smaller than the sum of its proper divisors (1893871344).

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

1153565664 is a wasteful number, since it uses less digits than its factorization.

1153565664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76707 (or 76699 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The square root of 1153565664 is about 33964.1820746503. The cubic root of 1153565664 is about 1048.7712501596.

The spelling of 1153565664 in words is "one billion, one hundred fifty-three million, five hundred sixty-five thousand, six hundred sixty-four".