555406316807665 has 8 divisors (see below), whose sum is σ = 689469910520040. Its totient is φ = 429003499878912.

The previous prime is 555406316807663. The next prime is 555406316807677. The reversal of 555406316807665 is 566708613604555.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 236228046962944 + 319178269844721 = 15369712^2 + 17865561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 555406316807665 - 2¹ = 555406316807663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 555406316807665.

It is not an unprimeable number, because it can be changed into a prime (555406316807663) 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, 1915194195744 + ... + 1915194196033.

It is an arithmetic number, because the mean of its divisors is an integer number (86183738815005).

Almost surely, 2^{555406316807665} is an apocalyptic number.

It is an amenable number.

555406316807665 is a deficient number, since it is larger than the sum of its proper divisors (134063593712375).

555406316807665 is a wasteful number, since it uses less digits than its factorization.

555406316807665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830388391811.

The product of its (nonzero) digits is 544320000, while the sum is 67.

The spelling of 555406316807665 in words is "five hundred fifty-five trillion, four hundred six billion, three hundred sixteen million, eight hundred seven thousand, six hundred sixty-five".