117516561 has 16 divisors (see below), whose sum is σ = 159686208. Its totient is φ = 76852800.

The previous prime is 117516559. The next prime is 117516569. The reversal of 117516561 is 165615711.

It is not a de Polignac number, because 117516561 - 2¹ = 117516559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117516569) 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, 98410 + ... + 99596.

It is an arithmetic number, because the mean of its divisors is an integer number (9980388).

Almost surely, 2^117516561 is an apocalyptic number.

It is an amenable number.

117516561 is a deficient number, since it is larger than the sum of its proper divisors (42169647).

117516561 is a wasteful number, since it uses less digits than its factorization.

117516561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792.

The product of its digits is 6300, while the sum is 33.

The square root of 117516561 is about 10840.5055693911. The cubic root of 117516561 is about 489.8160645187.

The spelling of 117516561 in words is "one hundred seventeen million, five hundred sixteen thousand, five hundred sixty-one".