2156484480 has 128 divisors (see below), whose sum is σ = 6887423520. Its totient is φ = 573923328.

The previous prime is 2156484469. The next prime is 2156484487. The reversal of 2156484480 is 844846512.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156484487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1483434 + ... + 1484886.

Almost surely, 2^2156484480 is an apocalyptic number.

2156484480 is a gapful number since it is divisible by the number (20) 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 2156484480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3443711760).

2156484480 is an abundant number, since it is smaller than the sum of its proper divisors (4730939040).

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

2156484480 is a wasteful number, since it uses less digits than its factorization.

2156484480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The square root of 2156484480 is about 46437.9637796491. The cubic root of 2156484480 is about 1291.9591407808.

The spelling of 2156484480 in words is "two billion, one hundred fifty-six million, four hundred eighty-four thousand, four hundred eighty".