944547985920 has 640 divisors, whose sum is σ = 3770810081280. Its totient is φ = 195951329280.

The previous prime is 944547985907. The next prime is 944547985943. The reversal of 944547985920 is 29589745449.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 596681449 + ... + 596683031.

It is an arithmetic number, because the mean of its divisors is an integer number (5891890752).

Almost surely, 2^944547985920 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 944547985920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1885405040640).

944547985920 is an abundant number, since it is smaller than the sum of its proper divisors (2826262095360).

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

944547985920 is a wasteful number, since it uses less digits than its factorization.

944547985920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 66.

The spelling of 944547985920 in words is "nine hundred forty-four billion, five hundred forty-seven million, nine hundred eighty-five thousand, nine hundred twenty".