2184021861534 has 24 divisors (see below), whose sum is σ = 4884694057152. Its totient is φ = 704523180960.

The previous prime is 2184021861521. The next prime is 2184021861601. The reversal of 2184021861534 is 4351681204812.

2184021861534 is a `hidden beast` number, since 2 + 1 + 8 + 4 + 0 + 21 + 8 + 615 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2184021861534.

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, 1957008279 + ... + 1957009394.

It is an arithmetic number, because the mean of its divisors is an integer number (203528919048).

Almost surely, 2^{2184021861534} is an apocalyptic number.

2184021861534 is an abundant number, since it is smaller than the sum of its proper divisors (2700672195618).

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

2184021861534 is a wasteful number, since it uses less digits than its factorization.

2184021861534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914017712 (or 3914017709 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 2184021861534 in words is "two trillion, one hundred eighty-four billion, twenty-one million, eight hundred sixty-one thousand, five hundred thirty-four".