2161318896 has 80 divisors (see below), whose sum is σ = 6767781120. Its totient is φ = 654943680.

The previous prime is 2161318889. The next prime is 2161318903. The reversal of 2161318896 is 6988131612.

2161318896 is a `hidden beast` number, since 21 + 613 + 1 + 8 + 8 + 9 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (2161318889) and next prime (2161318903).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

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, 222660 + ... + 232163.

It is an arithmetic number, because the mean of its divisors is an integer number (84597264).

Almost surely, 2^2161318896 is an apocalyptic number.

It is an amenable number.

2161318896 is an abundant number, since it is smaller than the sum of its proper divisors (4606462224).

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

2161318896 is a wasteful number, since it uses less digits than its factorization.

2161318896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454851 (or 454839 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 2161318896 is about 46489.9870509769. The cubic root of 2161318896 is about 1292.9238600521.

The spelling of 2161318896 in words is "two billion, one hundred sixty-one million, three hundred eighteen thousand, eight hundred ninety-six".