99806020255 has 16 divisors (see below), whose sum is σ = 126556462080. Its totient is φ = 75406544928.

The previous prime is 99806020253. The next prime is 99806020283. The reversal of 99806020255 is 55202060899.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99806020255 - 2¹ = 99806020253 is a prime.

It is a super-2 number, since 2×99806020255² (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 (99806020253) 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, 5483817 + ... + 5501986.

It is an arithmetic number, because the mean of its divisors is an integer number (7909778880).

Almost surely, 2^99806020255 is an apocalyptic number.

99806020255 is a deficient number, since it is larger than the sum of its proper divisors (26750441825).

99806020255 is a wasteful number, since it uses less digits than its factorization.

99806020255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985910.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 99806020255 in words is "ninety-nine billion, eight hundred six million, twenty thousand, two hundred fifty-five".