4209780556801 has 4 divisors (see below), whose sum is σ = 4209790593604. Its totient is φ = 4209770520000.

The previous prime is 4209780556799. The next prime is 4209780556853. The reversal of 4209780556801 is 1086550879024.

It is a happy number.

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 170384026176 + 4039396530625 = 412776^2 + 2009825^2 .

It is a cyclic number.

It is not a de Polignac number, because 4209780556801 - 2¹ = 4209780556799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4209780556871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4360500 + ... + 5237701.

It is an arithmetic number, because the mean of its divisors is an integer number (1052447648401).

Almost surely, 2^{4209780556801} is an apocalyptic number.

It is an amenable number.

4209780556801 is a deficient number, since it is larger than the sum of its proper divisors (10036803).

4209780556801 is an equidigital number, since it uses as much as digits as its factorization.

4209780556801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10036802.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 4209780556801 in words is "four trillion, two hundred nine billion, seven hundred eighty million, five hundred fifty-six thousand, eight hundred one".