2145899616 has 96 divisors (see below), whose sum is σ = 6559273728. Its totient is φ = 601536000.

The previous prime is 2145899551. The next prime is 2145899621. The reversal of 2145899616 is 6169985412.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5491 + ... + 65741.

It is an arithmetic number, because the mean of its divisors is an integer number (68325768).

Almost surely, 2^2145899616 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 2145899616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3279636864).

2145899616 is an abundant number, since it is smaller than the sum of its proper divisors (4413374112).

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

2145899616 is a wasteful number, since it uses less digits than its factorization.

2145899616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60324 (or 60316 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 2145899616 is about 46323.8557980659. The cubic root of 2145899616 is about 1289.8418603094.

The spelling of 2145899616 in words is "two billion, one hundred forty-five million, eight hundred ninety-nine thousand, six hundred sixteen".