505550005601 has 4 divisors (see below), whose sum is σ = 505553956272. Its totient is φ = 505546054932.

The previous prime is 505550005579. The next prime is 505550005673. The reversal of 505550005601 is 106500055505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 106500055505 = 5 ⋅21300011101.

It is a cyclic number.

It is not a de Polignac number, because 505550005601 - 2⁶ = 505550005537 is a prime.

It is a super-2 number, since 2×505550005601² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505550005001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1776731 + ... + 2041536.

It is an arithmetic number, because the mean of its divisors is an integer number (126388489068).

Almost surely, 2^505550005601 is an apocalyptic number.

It is an amenable number.

505550005601 is a deficient number, since it is larger than the sum of its proper divisors (3950671).

505550005601 is a wasteful number, since it uses less digits than its factorization.

505550005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950670.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 505550005601 in words is "five hundred five billion, five hundred fifty million, five thousand, six hundred one".