505501055999 has 4 divisors (see below), whose sum is σ = 516256397664. Its totient is φ = 494745714336.

The previous prime is 505501055981. The next prime is 505501056001. The reversal of 505501055999 is 999550105505.

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 505501055999 - 2³² = 501206088703 is a prime.

It is a super-2 number, since 2×505501055999² (a number of 24 digits) contains 22 as substring.

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 505501055999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505501055929) 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, 5377670762 + ... + 5377670855.

It is an arithmetic number, because the mean of its divisors is an integer number (129064099416).

Almost surely, 2^505501055999 is an apocalyptic number.

505501055999 is a deficient number, since it is larger than the sum of its proper divisors (10755341665).

505501055999 is a wasteful number, since it uses less digits than its factorization.

505501055999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10755341664.

The product of its (nonzero) digits is 2278125, while the sum is 53.

The spelling of 505501055999 in words is "five hundred five billion, five hundred one million, fifty-five thousand, nine hundred ninety-nine".