999955548 has 36 divisors (see below), whose sum is σ = 2533411608. Its totient is φ = 332560800.

The previous prime is 999955507. The next prime is 999955549. The reversal of 999955548 is 845559999.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×999955548² = 1999822195951960608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999955549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15403 + ... + 47298.

Almost surely, 2^999955548 is an apocalyptic number.

It is an amenable number.

999955548 is an abundant number, since it is smaller than the sum of its proper divisors (1533456060).

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

999955548 is a wasteful number, since it uses less digits than its factorization.

999955548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63154 (or 63149 counting only the distinct ones).

The product of its digits is 26244000, while the sum is 63.

The square root of 999955548 is about 31622.0737460401. The cubic root of 999955548 is about 999.9851824471.

The spelling of 999955548 in words is "nine hundred ninety-nine million, nine hundred fifty-five thousand, five hundred forty-eight".