9999995544 has 192 divisors, whose sum is σ = 35752803840. Its totient is φ = 2444590080.

The previous prime is 9999995539. The next prime is 9999995549. The reversal of 9999995544 is 4455999999.

It is an interprime number because it is at equal distance from previous prime (9999995539) and next prime (9999995549).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999995549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41197 + ... + 147299.

It is an arithmetic number, because the mean of its divisors is an integer number (186212520).

Almost surely, 2^9999995544 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 9999995544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17876401920).

9999995544 is an abundant number, since it is smaller than the sum of its proper divisors (25752808296).

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

9999995544 is a wasteful number, since it uses less digits than its factorization.

9999995544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106150 (or 106143 counting only the distinct ones).

The product of its digits is 212576400, while the sum is 72.

The square root of 9999995544 is about 99999.9777199975. The cubic root of 9999995544 is about 2154.4343700265.

It can be divided in two parts, 99999955 and 44, that added together give a palindrome (99999999).

The spelling of 9999995544 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-five thousand, five hundred forty-four".