2156128853 has 8 divisors (see below), whose sum is σ = 2283577920. Its totient is φ = 2028748480.

The previous prime is 2156128841. The next prime is 2156128867. The reversal of 2156128853 is 3588216512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156128853 - 2⁴ = 2156128837 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 2156128853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156128823) 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 7 ways as a sum of consecutive naturals, for example, 56528 + ... + 86646.

It is an arithmetic number, because the mean of its divisors is an integer number (285447240).

Almost surely, 2^2156128853 is an apocalyptic number.

It is an amenable number.

2156128853 is a deficient number, since it is larger than the sum of its proper divisors (127449067).

2156128853 is a wasteful number, since it uses less digits than its factorization.

2156128853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34347.

The product of its digits is 115200, while the sum is 41.

The square root of 2156128853 is about 46434.1345671479. The cubic root of 2156128853 is about 1291.8881176540. Note that the first 3 decimals are identical.

The spelling of 2156128853 in words is "two billion, one hundred fifty-six million, one hundred twenty-eight thousand, eight hundred fifty-three".