506821223787 has 16 divisors (see below), whose sum is σ = 678293713920. Its totient is φ = 336616653312.

The previous prime is 506821223773. The next prime is 506821223789. The reversal of 506821223787 is 787322128605.

It is not a de Polignac number, because 506821223787 - 2⁷ = 506821223659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (506821223789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 848139 + ... + 1316427.

It is an arithmetic number, because the mean of its divisors is an integer number (42393357120).

Almost surely, 2^506821223787 is an apocalyptic number.

506821223787 is a deficient number, since it is larger than the sum of its proper divisors (171472490133).

506821223787 is a wasteful number, since it uses less digits than its factorization.

506821223787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469642.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 506821223787 in words is "five hundred six billion, eight hundred twenty-one million, two hundred twenty-three thousand, seven hundred eighty-seven".