2158965719 has 4 divisors (see below), whose sum is σ = 2171027160. Its totient is φ = 2146904280.

The previous prime is 2158965713. The next prime is 2158965761. The reversal of 2158965719 is 9175698512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158965719 is a prime.

It is a super-2 number, since 2×2158965719² = 9322265951634373922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158965713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6030452 + ... + 6030809.

It is an arithmetic number, because the mean of its divisors is an integer number (542756790).

Almost surely, 2^2158965719 is an apocalyptic number.

2158965719 is a deficient number, since it is larger than the sum of its proper divisors (12061441).

2158965719 is a wasteful number, since it uses less digits than its factorization.

2158965719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12061440.

The product of its digits is 1360800, while the sum is 53.

The square root of 2158965719 is about 46464.6717302511. The cubic root of 2158965719 is about 1292.4544578506.

The spelling of 2158965719 in words is "two billion, one hundred fifty-eight million, nine hundred sixty-five thousand, seven hundred nineteen".