2145719916 has 24 divisors (see below), whose sum is σ = 5562977840. Its totient is φ = 715239936.

The previous prime is 2145719911. The next prime is 2145719941. The reversal of 2145719916 is 6199175412.

2145719916 is a `hidden beast` number, since 2 + 1 + 457 + 199 + 1 + 6 = 666.

It is a super-2 number, since 2×2145719916² = 9208227915838094112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2145719911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9933781 + ... + 9933996.

Almost surely, 2^2145719916 is an apocalyptic number.

It is an amenable number.

2145719916 is an abundant number, since it is smaller than the sum of its proper divisors (3417257924).

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

2145719916 is a wasteful number, since it uses less digits than its factorization.

2145719916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19867790 (or 19867782 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 2145719916 is about 46321.9161520764. The cubic root of 2145719916 is about 1289.8058550444.

The spelling of 2145719916 in words is "two billion, one hundred forty-five million, seven hundred nineteen thousand, nine hundred sixteen".