505583582987 has 4 divisors (see below), whose sum is σ = 577809809136. Its totient is φ = 433357356840.

The previous prime is 505583582983. The next prime is 505583583049. The reversal of 505583582987 is 789285385505.

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 505583582987 - 2² = 505583582983 is a prime.

It is a super-2 number, since 2×505583582987² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505583582983) 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, 36113113064 + ... + 36113113077.

It is an arithmetic number, because the mean of its divisors is an integer number (144452452284).

Almost surely, 2^505583582987 is an apocalyptic number.

505583582987 is a deficient number, since it is larger than the sum of its proper divisors (72226226149).

505583582987 is an equidigital number, since it uses as much as digits as its factorization.

505583582987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72226226148.

The product of its (nonzero) digits is 120960000, while the sum is 65.

The spelling of 505583582987 in words is "five hundred five billion, five hundred eighty-three million, five hundred eighty-two thousand, nine hundred eighty-seven".