1161646005 has 48 divisors (see below), whose sum is σ = 2037220416. Its totient is φ = 564894720.

The previous prime is 1161645973. The next prime is 1161646009. The reversal of 1161646005 is 5006461611.

It is not a de Polignac number, because 1161646005 - 2⁵ = 1161645973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161646009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207645 + ... + 213165.

It is an arithmetic number, because the mean of its divisors is an integer number (42442092).

Almost surely, 2^1161646005 is an apocalyptic number.

1161646005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1161646005 is a deficient number, since it is larger than the sum of its proper divisors (875574411).

1161646005 is a wasteful number, since it uses less digits than its factorization.

1161646005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5638 (or 5625 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1161646005 is about 34082.9283513022. The cubic root of 1161646005 is about 1051.2143184629.

The spelling of 1161646005 in words is "one billion, one hundred sixty-one million, six hundred forty-six thousand, five".