99995556 has 72 divisors (see below), whose sum is σ = 252703584. Its totient is φ = 30752640.

The previous prime is 99995551. The next prime is 99995563. The reversal of 99995556 is 65559999.

It is a super-2 number, since 2×99995556² = 19998222439498272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 99995496 and 99995505.

It is not an unprimeable number, because it can be changed into a prime (99995551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177331 + ... + 177893.

It is an arithmetic number, because the mean of its divisors is an integer number (3509772).

Almost surely, 2^99995556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99995556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126351792).

99995556 is an abundant number, since it is smaller than the sum of its proper divisors (152708028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99995556 is a wasteful number, since it uses less digits than its factorization.

99995556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 628 counting only the distinct ones).

The product of its digits is 4920750, while the sum is 57.

The square root of 99995556 is about 9999.7777975313. Note that the first 4 decimals coincide. The cubic root of 99995556 is about 464.1520075192.

The spelling of 99995556 in words is "ninety-nine million, nine hundred ninety-five thousand, five hundred fifty-six".