2178390827146 has 16 divisors (see below), whose sum is σ = 3380322702600. Its totient is φ = 1051617950208.

The previous prime is 2178390827131. The next prime is 2178390827153. The reversal of 2178390827146 is 6417280938712.

It can be written as a sum of positive squares in 4 ways, for example, as 2178384124225 + 6702921 = 1475935^2 + 2589^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3217090 + ... + 3834898.

Almost surely, 2^{2178390827146} is an apocalyptic number.

2178390827146 is a deficient number, since it is larger than the sum of its proper divisors (1201931875454).

2178390827146 is a wasteful number, since it uses less digits than its factorization.

2178390827146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678633.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 2178390827146 in words is "two trillion, one hundred seventy-eight billion, three hundred ninety million, eight hundred twenty-seven thousand, one hundred forty-six".