214506178561 has 4 divisors (see below), whose sum is σ = 215617609732. Its totient is φ = 213394747392.

The previous prime is 214506178541. The next prime is 214506178567. The reversal of 214506178561 is 165871605412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22360716225 + 192145462336 = 149535^2 + 438344^2 .

It is a cyclic number.

It is not a de Polignac number, because 214506178561 - 2⁵ = 214506178529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214506178567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555715296 + ... + 555715681.

It is an arithmetic number, because the mean of its divisors is an integer number (53904402433).

Almost surely, 2^214506178561 is an apocalyptic number.

It is an amenable number.

214506178561 is a deficient number, since it is larger than the sum of its proper divisors (1111431171).

214506178561 is a wasteful number, since it uses less digits than its factorization.

214506178561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111431170.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 214506178561 in words is "two hundred fourteen billion, five hundred six million, one hundred seventy-eight thousand, five hundred sixty-one".