116561005 has 16 divisors (see below), whose sum is σ = 157852800. Its totient is φ = 81847360.

The previous prime is 116560979. The next prime is 116561009. The reversal of 116561005 is 500165611.

It is not a de Polignac number, because 116561005 - 2⁵ = 116560973 is a prime.

It is a super-2 number, since 2×116561005² = 27172935773220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116561009) 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, 34945 + ... + 38134.

It is an arithmetic number, because the mean of its divisors is an integer number (9865800).

Almost surely, 2^116561005 is an apocalyptic number.

It is an amenable number.

116561005 is a deficient number, since it is larger than the sum of its proper divisors (41291795).

116561005 is a wasteful number, since it uses less digits than its factorization.

116561005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73124.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 116561005 is about 10796.3422046543. The cubic root of 116561005 is about 488.4848449353.

The spelling of 116561005 in words is "one hundred sixteen million, five hundred sixty-one thousand, five".