555555561001 has 16 divisors (see below), whose sum is σ = 636061352320. Its totient is φ = 475335527040.

The previous prime is 555555560947. The next prime is 555555561101. The reversal of 555555561001 is 100165555555.

It is a cyclic number.

It is not a de Polignac number, because 555555561001 - 2¹⁷ = 555555429929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555555561101) 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 15 ways as a sum of consecutive naturals, for example, 12273631 + ... + 12318811.

It is an arithmetic number, because the mean of its divisors is an integer number (39753834520).

Almost surely, 2^555555561001 is an apocalyptic number.

It is an amenable number.

555555561001 is a deficient number, since it is larger than the sum of its proper divisors (80505791319).

555555561001 is a wasteful number, since it uses less digits than its factorization.

555555561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48304.

The product of its (nonzero) digits is 468750, while the sum is 43.

The spelling of 555555561001 in words is "five hundred fifty-five billion, five hundred fifty-five million, five hundred sixty-one thousand, one".