99761565 has 16 divisors (see below), whose sum is σ = 164768256. Its totient is φ = 51489600.

The previous prime is 99761561. The next prime is 99761567. The reversal of 99761565 is 56516799.

It is not a de Polignac number, because 99761565 - 2² = 99761561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99761561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106806 + ... + 107735.

It is an arithmetic number, because the mean of its divisors is an integer number (10298016).

Almost surely, 2^99761565 is an apocalyptic number.

It is an amenable number.

99761565 is a deficient number, since it is larger than the sum of its proper divisors (65006691).

99761565 is a wasteful number, since it uses less digits than its factorization.

99761565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214580.

The product of its digits is 510300, while the sum is 48.

The square root of 99761565 is about 9988.0711351091. The cubic root of 99761565 is about 463.7896840276.

The spelling of 99761565 in words is "ninety-nine million, seven hundred sixty-one thousand, five hundred sixty-five".