2156227776 has 280 divisors, whose sum is σ = 6937278480. Its totient is φ = 659570688.

The previous prime is 2156227763. The next prime is 2156227783. The reversal of 2156227776 is 6777226512.

2156227776 is a `hidden beast` number, since 2 + 15 + 622 + 7 + 7 + 7 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3789220 + ... + 3789788.

Almost surely, 2^2156227776 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 2156227776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3468639240).

2156227776 is an abundant number, since it is smaller than the sum of its proper divisors (4781050704).

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

2156227776 is a wasteful number, since it uses less digits than its factorization.

2156227776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 634 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 2156227776 is about 46435.1997519123. The cubic root of 2156227776 is about 1291.9078745892.

It can be divided in two parts, 215622 and 7776, that multiplied together give a cube (1676676672 = 1188³).

The spelling of 2156227776 in words is "two billion, one hundred fifty-six million, two hundred twenty-seven thousand, seven hundred seventy-six".