2163956940 has 144 divisors (see below), whose sum is σ = 6803596800. Its totient is φ = 556343424.

The previous prime is 2163956849. The next prime is 2163956969. The reversal of 2163956940 is 496593612.

2163956940 is a `hidden beast` number, since 2 + 1 + 639 + 5 + 6 + 9 + 4 + 0 = 666.

2163956940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 609691 + ... + 613229.

It is an arithmetic number, because the mean of its divisors is an integer number (47247200).

Almost surely, 2^2163956940 is an apocalyptic number.

2163956940 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 2163956940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3401798400).

2163956940 is an abundant number, since it is smaller than the sum of its proper divisors (4639639860).

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

2163956940 is a wasteful number, since it uses less digits than its factorization.

2163956940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676 (or 3671 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 2163956940 is about 46518.3505726504. The cubic root of 2163956940 is about 1293.4496814651.

The spelling of 2163956940 in words is "two billion, one hundred sixty-three million, nine hundred fifty-six thousand, nine hundred forty".