99555855599 has 16 divisors (see below), whose sum is σ = 100942122240. Its totient is φ = 98179065600.

The previous prime is 99555855589. The next prime is 99555855629.

99555855599 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99555855599 is a prime.

It is a super-2 number, since 2×99555855599² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99555855589) 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, 25850024 + ... + 25853874.

It is an arithmetic number, because the mean of its divisors is an integer number (6308882640).

Almost surely, 2^99555855599 is an apocalyptic number.

99555855599 is a deficient number, since it is larger than the sum of its proper divisors (1386266641).

99555855599 is a wasteful number, since it uses less digits than its factorization.

99555855599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990.

The product of its digits is 820125000, while the sum is 74.

The spelling of 99555855599 in words is "ninety-nine billion, five hundred fifty-five million, eight hundred fifty-five thousand, five hundred ninety-nine".