1161643406 has 32 divisors (see below), whose sum is σ = 2225422080. Its totient is φ = 441547200.

The previous prime is 1161643403. The next prime is 1161643421. The reversal of 1161643406 is 6043461611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161643403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85676 + ... + 98303.

It is an arithmetic number, because the mean of its divisors is an integer number (69544440).

Almost surely, 2^1161643406 is an apocalyptic number.

1161643406 is a deficient number, since it is larger than the sum of its proper divisors (1063778674).

1161643406 is a wasteful number, since it uses less digits than its factorization.

1161643406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184040.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1161643406 is about 34082.8902236885. The cubic root of 1161643406 is about 1051.2135344868.

The spelling of 1161643406 in words is "one billion, one hundred sixty-one million, six hundred forty-three thousand, four hundred six".