99999554455 has 32 divisors (see below), whose sum is σ = 128762726400. Its totient is φ = 74333376000.

The previous prime is 99999554329. The next prime is 99999554489. The reversal of 99999554455 is 55445599999.

It is not a de Polignac number, because 99999554455 - 2⁹ = 99999553943 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1089135 + ... + 1177375.

It is an arithmetic number, because the mean of its divisors is an integer number (4023835200).

Almost surely, 2^99999554455 is an apocalyptic number.

99999554455 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99999554455 is a deficient number, since it is larger than the sum of its proper divisors (28763171945).

99999554455 is a wasteful number, since it uses less digits than its factorization.

99999554455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88495.

The product of its digits is 590490000, while the sum is 73.

The spelling of 99999554455 in words is "ninety-nine billion, nine hundred ninety-nine million, five hundred fifty-four thousand, four hundred fifty-five".