2161438704 has 60 divisors (see below), whose sum is σ = 6052186296. Its totient is φ = 720103296.

The previous prime is 2161438673. The next prime is 2161438711. The reversal of 2161438704 is 4078341612.

2161438704 is a `hidden beast` number, since 2 + 1 + 614 + 38 + 7 + 0 + 4 = 666.

2161438704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2161438704² = 9343634542298399232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476254 + ... + 480770.

Almost surely, 2^2161438704 is an apocalyptic number.

2161438704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2161438704 is an abundant number, since it is smaller than the sum of its proper divisors (3890747592).

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

2161438704 is a wasteful number, since it uses less digits than its factorization.

2161438704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854 (or 7845 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2161438704 is about 46491.2755686484. The cubic root of 2161438704 is about 1292.9477497490.

The spelling of 2161438704 in words is "two billion, one hundred sixty-one million, four hundred thirty-eight thousand, seven hundred four".