2156072118 has 32 divisors (see below), whose sum is σ = 4584542976. Its totient is φ = 674470368.

The previous prime is 2156072111. The next prime is 2156072129. The reversal of 2156072118 is 8112706512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156072111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140080 + ... + 154707.

It is an arithmetic number, because the mean of its divisors is an integer number (143266968).

Almost surely, 2^2156072118 is an apocalyptic number.

2156072118 is an abundant number, since it is smaller than the sum of its proper divisors (2428470858).

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

2156072118 is a wasteful number, since it uses less digits than its factorization.

2156072118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294868.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 2156072118 is about 46433.5236440225. The cubic root of 2156072118 is about 1291.8767862479.

The spelling of 2156072118 in words is "two billion, one hundred fifty-six million, seventy-two thousand, one hundred eighteen".