2143977696 has 144 divisors (see below), whose sum is σ = 6981496704. Its totient is φ = 611373312.

The previous prime is 2143977679. The next prime is 2143977739. The reversal of 2143977696 is 6967793412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1908591 + ... + 1909713.

It is an arithmetic number, because the mean of its divisors is an integer number (48482616).

Almost surely, 2^2143977696 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 2143977696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3490748352).

2143977696 is an abundant number, since it is smaller than the sum of its proper divisors (4837519008).

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

2143977696 is a wasteful number, since it uses less digits than its factorization.

2143977696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093 (or 2082 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 2143977696 is about 46303.1067640175. The cubic root of 2143977696 is about 1289.4566740229.

The spelling of 2143977696 in words is "two billion, one hundred forty-three million, nine hundred seventy-seven thousand, six hundred ninety-six".