505510600987 has 4 divisors (see below), whose sum is σ = 577726401136. Its totient is φ = 433294800840.

The previous prime is 505510600939. The next prime is 505510600997. The reversal of 505510600987 is 789006015505.

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 505510600987 - 2¹⁵ = 505510568219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505510600927) 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, 36107900064 + ... + 36107900077.

It is an arithmetic number, because the mean of its divisors is an integer number (144431600284).

Almost surely, 2^505510600987 is an apocalyptic number.

505510600987 is a deficient number, since it is larger than the sum of its proper divisors (72215800149).

505510600987 is an equidigital number, since it uses as much as digits as its factorization.

505510600987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72215800148.

The product of its (nonzero) digits is 378000, while the sum is 46.

The spelling of 505510600987 in words is "five hundred five billion, five hundred ten million, six hundred thousand, nine hundred eighty-seven".