2156180448 has 288 divisors, whose sum is σ = 6535710720. Its totient is φ = 620421120.

The previous prime is 2156180437. The next prime is 2156180449. The reversal of 2156180448 is 8440816512.

It is a super-2 number, since 2×2156180448² = 9298228248674961408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156180449) 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 47 ways as a sum of consecutive naturals, for example, 19781418 + ... + 19781526.

It is an arithmetic number, because the mean of its divisors is an integer number (22693440).

Almost surely, 2^2156180448 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 2156180448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3267855360).

2156180448 is an abundant number, since it is smaller than the sum of its proper divisors (4379530272).

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

2156180448 is a wasteful number, since it uses less digits than its factorization.

2156180448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 2156180448 is about 46434.6901357164. The cubic root of 2156180448 is about 1291.8984223004.

The spelling of 2156180448 in words is "two billion, one hundred fifty-six million, one hundred eighty thousand, four hundred forty-eight".