505387783505 has 24 divisors (see below), whose sum is σ = 678128801472. Its totient is φ = 358589936000.

The previous prime is 505387783501. The next prime is 505387783517.

505387783505 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 505387783505 - 2² = 505387783501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505387783501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2640701 + ... + 2825610.

It is an arithmetic number, because the mean of its divisors is an integer number (28255366728).

Almost surely, 2^505387783505 is an apocalyptic number.

505387783505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

505387783505 is a deficient number, since it is larger than the sum of its proper divisors (172741017967).

505387783505 is a wasteful number, since it uses less digits than its factorization.

505387783505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5466409 (or 5466368 counting only the distinct ones).

The product of its (nonzero) digits is 17640000, while the sum is 56.

The spelling of 505387783505 in words is "five hundred five billion, three hundred eighty-seven million, seven hundred eighty-three thousand, five hundred five".