505000055551 has 16 divisors (see below), whose sum is σ = 533831840640. Its totient is φ = 476941248000.

The previous prime is 505000055537. The next prime is 505000055627. The reversal of 505000055551 is 155550000505.

It is a cyclic number.

It is not a de Polignac number, because 505000055551 - 2⁹ = 505000055039 is a prime.

It is a super-2 number, since 2×505000055551² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505000052551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2317801 + ... + 2526301.

It is an arithmetic number, because the mean of its divisors is an integer number (33364490040).

Almost surely, 2^505000055551 is an apocalyptic number.

505000055551 is a deficient number, since it is larger than the sum of its proper divisors (28831785089).

505000055551 is a wasteful number, since it uses less digits than its factorization.

505000055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210354.

The product of its (nonzero) digits is 15625, while the sum is 31.

The spelling of 505000055551 in words is "five hundred five billion, fifty-five thousand, five hundred fifty-one".