505050499999 has 4 divisors (see below), whose sum is σ = 506774222136. Its totient is φ = 503326777864.

The previous prime is 505050499931. The next prime is 505050500011. The reversal of 505050499999 is 999994050505.

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: 999994050505 = 5 ⋅199998810101.

It is a cyclic number.

It is not a de Polignac number, because 505050499999 - 2²¹ = 505048402847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505050499999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505050899999) 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, 861860629 + ... + 861861214.

It is an arithmetic number, because the mean of its divisors is an integer number (126693555534).

Almost surely, 2^505050499999 is an apocalyptic number.

505050499999 is a deficient number, since it is larger than the sum of its proper divisors (1723722137).

505050499999 is a wasteful number, since it uses less digits than its factorization.

505050499999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723722136.

The product of its (nonzero) digits is 29524500, while the sum is 64.

The spelling of 505050499999 in words is "five hundred five billion, fifty million, four hundred ninety-nine thousand, nine hundred ninety-nine".