44099121600 has 420 divisors, whose sum is σ = 170638241400. Its totient is φ = 11140208640.

The previous prime is 44099121509. The next prime is 44099121611. The reversal of 44099121600 is 612199044.

It is a happy number.

44099121600 is a `hidden beast` number, since 4 + 40 + 9 + 9 + 1 + 2 + 1 + 600 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2453446 + ... + 2471354.

Almost surely, 2^44099121600 is an apocalyptic number.

44099121600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44099121600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85319120700).

44099121600 is an abundant number, since it is smaller than the sum of its proper divisors (126539119800).

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

44099121600 is a wasteful number, since it uses less digits than its factorization.

44099121600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17962 (or 17938 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 44099121600 in words is "forty-four billion, ninety-nine million, one hundred twenty-one thousand, six hundred".