2156773824 has 112 divisors (see below), whose sum is σ = 6351930400. Its totient is φ = 717631488.

The previous prime is 2156773813. The next prime is 2156773837. The reversal of 2156773824 is 4283776512.

2156773824 is a `hidden beast` number, since 2 + 1 + 567 + 7 + 3 + 82 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2156773824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1742934 + ... + 1744170.

Almost surely, 2^2156773824 is an apocalyptic number.

2156773824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156773824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3175965200).

2156773824 is an abundant number, since it is smaller than the sum of its proper divisors (4195156576).

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

2156773824 is a wasteful number, since it uses less digits than its factorization.

2156773824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267 (or 2251 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 2156773824 is about 46441.0790572312. The cubic root of 2156773824 is about 1292.0169206090.

The spelling of 2156773824 in words is "two billion, one hundred fifty-six million, seven hundred seventy-three thousand, eight hundred twenty-four".