505000000055 has 4 divisors (see below), whose sum is σ = 606000000072. Its totient is φ = 404000000040.

The previous prime is 505000000033. The next prime is 505000000079. The reversal of 505000000055 is 550000000505.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550000000505 = 5 ⋅110000000101.

It is not a de Polignac number, because 505000000055 - 2¹² = 504999995959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 504999999973 and 505000000036.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50500000001 + ... + 50500000010.

It is an arithmetic number, because the mean of its divisors is an integer number (151500000018).

Almost surely, 2^505000000055 is an apocalyptic number.

505000000055 is a deficient number, since it is larger than the sum of its proper divisors (101000000017).

505000000055 is a wasteful number, since it uses less digits than its factorization.

505000000055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101000000016.

The product of its (nonzero) digits is 625, while the sum is 20.

The spelling of 505000000055 in words is "five hundred five billion, fifty-five", and thus it is an aban number.