505000000551 has 4 divisors (see below), whose sum is σ = 673333334072. Its totient is φ = 336666667032.

The previous prime is 505000000481. The next prime is 505000000553. The reversal of 505000000551 is 155000000505.

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

It is not a de Polignac number, because 505000000551 - 2¹³ = 504999992359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505000000553) 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, 84166666756 + ... + 84166666761.

It is an arithmetic number, because the mean of its divisors is an integer number (168333333518).

Almost surely, 2^505000000551 is an apocalyptic number.

505000000551 is a deficient number, since it is larger than the sum of its proper divisors (168333333521).

505000000551 is a wasteful number, since it uses less digits than its factorization.

505000000551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168333333520.

The product of its (nonzero) digits is 625, while the sum is 21.

The spelling of 505000000551 in words is "five hundred five billion, five hundred fifty-one", and thus it is an aban number.