99999616 has 16 divisors (see below), whose sum is σ = 199218240. Its totient is φ = 49999744.

The previous prime is 99999611. The next prime is 99999617. The reversal of 99999616 is 61699999.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390496 + ... + 390751.

It is an arithmetic number, because the mean of its divisors is an integer number (12451140).

Almost surely, 2^99999616 is an apocalyptic number.

It is an amenable number.

99999616 is a deficient number, since it is larger than the sum of its proper divisors (99218624).

99999616 is an equidigital number, since it uses as much as digits as its factorization.

99999616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781261 (or 781249 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 58.

The square root of 99999616 is about 9999.9807999816. The cubic root of 99999616 is about 464.1582892371.

The spelling of 99999616 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred sixteen".