2179859742 has 16 divisors (see below), whose sum is σ = 4844132880. Its totient is φ = 726619896.

The previous prime is 2179859741. The next prime is 2179859783. The reversal of 2179859742 is 2479589712.

2179859742 is a `hidden beast` number, since 2 + 1 + 7 + 9 + 8 + 597 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 40367773 = 2179859742 / (2 + 1 + 7 + 9 + 8 + 5 + 9 + 7 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179859741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20183833 + ... + 20183940.

It is an arithmetic number, because the mean of its divisors is an integer number (302758305).

Almost surely, 2^2179859742 is an apocalyptic number.

2179859742 is an abundant number, since it is smaller than the sum of its proper divisors (2664273138).

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

2179859742 is a wasteful number, since it uses less digits than its factorization.

2179859742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40367784 (or 40367778 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 2179859742 is about 46688.9680973996. The cubic root of 2179859742 is about 1296.6104484437.

The spelling of 2179859742 in words is "two billion, one hundred seventy-nine million, eight hundred fifty-nine thousand, seven hundred forty-two".