99554426881 has 12 divisors (see below), whose sum is σ = 123201760512. Its totient is φ = 78768336816.

The previous prime is 99554426849. The next prime is 99554426887. The reversal of 99554426881 is 18862445599.

It is not a de Polignac number, because 99554426881 - 2⁵ = 99554426849 is a prime.

It is a super-2 number, since 2×99554426881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99554426887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42075921 + ... + 42078286.

It is an arithmetic number, because the mean of its divisors is an integer number (10266813376).

It is a Proth number, since it is equal to 189885 ⋅ 2¹⁹ + 1 and 189885 < 2¹⁹.

Almost surely, 2^99554426881 is an apocalyptic number.

99554426881 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99554426881 is a deficient number, since it is larger than the sum of its proper divisors (23647333631).

99554426881 is a wasteful number, since it uses less digits than its factorization.

99554426881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84154240 (or 84154227 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 61.

The spelling of 99554426881 in words is "ninety-nine billion, five hundred fifty-four million, four hundred twenty-six thousand, eight hundred eighty-one".