1161605504 has 16 divisors (see below), whose sum is σ = 2314136220. Its totient is φ = 580802688.

The previous prime is 1161605453. The next prime is 1161605507. The reversal of 1161605504 is 4055061611.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161605507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4537394 + ... + 4537649.

Almost surely, 2^1161605504 is an apocalyptic number.

It is an amenable number.

1161605504 is a deficient number, since it is larger than the sum of its proper divisors (1152530716).

1161605504 is an frugal number, since it uses more digits than its factorization.

1161605504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075057 (or 9075045 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1161605504 is about 34082.3341923642. The cubic root of 1161605504 is about 1051.2021013945.

The spelling of 1161605504 in words is "one billion, one hundred sixty-one million, six hundred five thousand, five hundred four".