9955391544 has 144 divisors (see below), whose sum is σ = 33015551400. Its totient is φ = 2694674304.

The previous prime is 9955391531. The next prime is 9955391549. The reversal of 9955391544 is 4451935599.

9955391544 is a `hidden beast` number, since 9 + 9 + 5 + 5 + 3 + 91 + 544 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9955391549) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7227 + ... + 141290.

Almost surely, 2^9955391544 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 9955391544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16507775700).

9955391544 is an abundant number, since it is smaller than the sum of its proper divisors (23060159856).

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

9955391544 is a wasteful number, since it uses less digits than its factorization.

9955391544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148562 (or 148548 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 54.

The square root of 9955391544 is about 99776.7084243612. The cubic root of 9955391544 is about 2151.2263811996.

The spelling of 9955391544 in words is "nine billion, nine hundred fifty-five million, three hundred ninety-one thousand, five hundred forty-four".