2178702120084 has 192 divisors, whose sum is σ = 6132308582400. Its totient is φ = 588120901632.

The previous prime is 2178702120031. The next prime is 2178702120121. The reversal of 2178702120084 is 4800212078712.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1679800524 + ... + 1679801820.

It is an arithmetic number, because the mean of its divisors is an integer number (31939107200).

Almost surely, 2^{2178702120084} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2178702120084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3066154291200).

2178702120084 is an abundant number, since it is smaller than the sum of its proper divisors (3953606462316).

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

2178702120084 is a wasteful number, since it uses less digits than its factorization.

2178702120084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382 (or 3380 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

Adding to 2178702120084 its reverse (4800212078712), we get a palindrome (6978914198796).

The spelling of 2178702120084 in words is "two trillion, one hundred seventy-eight billion, seven hundred two million, one hundred twenty thousand, eighty-four".