505005551003 has 4 divisors (see below), whose sum is σ = 505330733208. Its totient is φ = 504680368800.

The previous prime is 505005550999. The next prime is 505005551023. The reversal of 505005551003 is 300155500505.

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

It is a cyclic number.

It is not a de Polignac number, because 505005551003 - 2² = 505005550999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505005551023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162588773 + ... + 162591878.

It is an arithmetic number, because the mean of its divisors is an integer number (126332683302).

Almost surely, 2^505005551003 is an apocalyptic number.

505005551003 is a deficient number, since it is larger than the sum of its proper divisors (325182205).

505005551003 is a wasteful number, since it uses less digits than its factorization.

505005551003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325182204.

The product of its (nonzero) digits is 9375, while the sum is 29.

The spelling of 505005551003 in words is "five hundred five billion, five million, five hundred fifty-one thousand, three".