2158711853 has 4 divisors (see below), whose sum is σ = 2171955648. Its totient is φ = 2145468060.

The previous prime is 2158711823. The next prime is 2158711873. The reversal of 2158711853 is 3581178512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158711853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2158711853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158711823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6621653 + ... + 6621978.

It is an arithmetic number, because the mean of its divisors is an integer number (542988912).

Almost surely, 2^2158711853 is an apocalyptic number.

It is an amenable number.

2158711853 is a deficient number, since it is larger than the sum of its proper divisors (13243795).

2158711853 is a wasteful number, since it uses less digits than its factorization.

2158711853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13243794.

The product of its digits is 67200, while the sum is 41.

The square root of 2158711853 is about 46461.9398325124. The cubic root of 2158711853 is about 1292.4037973110.

The spelling of 2158711853 in words is "two billion, one hundred fifty-eight million, seven hundred eleven thousand, eight hundred fifty-three".