2145808800 has 288 divisors, whose sum is σ = 7953240960. Its totient is φ = 558028800.

The previous prime is 2145808783. The next prime is 2145808807. The reversal of 2145808800 is 88085412.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is not an unprimeable number, because it can be changed into a prime (2145808807) 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, 884389 + ... + 886811.

It is an arithmetic number, because the mean of its divisors is an integer number (27615420).

Almost surely, 2^2145808800 is an apocalyptic number.

2145808800 is a gapful number since it is divisible by the number (20) 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 2145808800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3976620480).

2145808800 is an abundant number, since it is smaller than the sum of its proper divisors (5807432160).

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

2145808800 is a wasteful number, since it uses less digits than its factorization.

2145808800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 2145808800 is about 46322.8755584107. The cubic root of 2145808800 is about 1289.8236643773.

The spelling of 2145808800 in words is "two billion, one hundred forty-five million, eight hundred eight thousand, eight hundred".