99555555599 has 2 divisors, whose sum is σ = 99555555600. Its totient is φ = 99555555598.

The previous prime is 99555555581. The next prime is 99555555667.

99555555599 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 99555555599 - 2⁸ = 99555555343 is a prime.

It is a super-2 number, since 2×99555555599² (a number of 23 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99555554599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49777777799 + 49777777800.

It is an arithmetic number, because the mean of its divisors is an integer number (49777777800).

Almost surely, 2^99555555599 is an apocalyptic number.

99555555599 is a deficient number, since it is larger than the sum of its proper divisors (1).

99555555599 is an equidigital number, since it uses as much as digits as its factorization.

99555555599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512578125, while the sum is 71.

The spelling of 99555555599 in words is "ninety-nine billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred ninety-nine".