2156027616 has 144 divisors (see below), whose sum is σ = 6309576000. Its totient is φ = 698010624.

The previous prime is 2156027609. The next prime is 2156027617. The reversal of 2156027616 is 6167206512.

It is a happy number.

2156027616 is a `hidden beast` number, since 2 + 15 + 6 + 0 + 27 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156027617) 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 23 ways as a sum of consecutive naturals, for example, 2016330 + ... + 2017398.

It is an arithmetic number, because the mean of its divisors is an integer number (43816500).

Almost surely, 2^2156027616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156027616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3154788000).

2156027616 is an abundant number, since it is smaller than the sum of its proper divisors (4153548384).

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

2156027616 is a wasteful number, since it uses less digits than its factorization.

2156027616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 2156027616 is about 46433.0444403552. The cubic root of 2156027616 is about 1291.8678979403.

The spelling of 2156027616 in words is "two billion, one hundred fifty-six million, twenty-seven thousand, six hundred sixteen".