44991313920 has 1152 divisors, whose sum is σ = 192931502400. Its totient is φ = 10032906240.

The previous prime is 44991313897. The next prime is 44991313931. The reversal of 44991313920 is 2931319944.

44991313920 is a `hidden beast` number, since 4 + 499 + 1 + 3 + 139 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1097349100 + ... + 1097349140.

Almost surely, 2^44991313920 is an apocalyptic number.

44991313920 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 44991313920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96465751200).

44991313920 is an abundant number, since it is smaller than the sum of its proper divisors (147940188480).

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

44991313920 is an frugal number, since it uses more digits than its factorization.

44991313920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 44991313920 in words is "forty-four billion, nine hundred ninety-one million, three hundred thirteen thousand, nine hundred twenty".