116615565 has 80 divisors (see below), whose sum is σ = 231912000. Its totient is φ = 55582560.

The previous prime is 116615561. The next prime is 116615617. The reversal of 116615565 is 565516611.

It is not a de Polignac number, because 116615565 - 2² = 116615561 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116615561) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1976506 + ... + 1976564.

It is an arithmetic number, because the mean of its divisors is an integer number (2898900).

Almost surely, 2^116615565 is an apocalyptic number.

116615565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

116615565 is a deficient number, since it is larger than the sum of its proper divisors (115296435).

116615565 is an frugal number, since it uses more digits than its factorization.

116615565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 78 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 116615565 is about 10798.8686907472. The cubic root of 116615565 is about 488.5610498829.

The spelling of 116615565 in words is "one hundred sixteen million, six hundred fifteen thousand, five hundred sixty-five".