4927387731985 has 32 divisors (see below), whose sum is σ = 6230874640032. Its totient is φ = 3735758315520.

The previous prime is 4927387731977. The next prime is 4927387732013. The reversal of 4927387731985 is 5891377837294.

It is a Cunningham number, because it is equal to 2219772²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 2074014740736 + 2853372991249 = 1440144^2 + 1689193^2 .

It is not a de Polignac number, because 4927387731985 - 2³ = 4927387731977 is a prime.

It is a super-2 number, since 2×4927387731985² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4153509 + ... + 5206381.

It is an arithmetic number, because the mean of its divisors is an integer number (194714832501).

Almost surely, 2^{4927387731985} is an apocalyptic number.

It is an amenable number.

4927387731985 is a deficient number, since it is larger than the sum of its proper divisors (1303486908047).

4927387731985 is a wasteful number, since it uses less digits than its factorization.

4927387731985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053573.

The product of its digits is 640120320, while the sum is 73.

The spelling of 4927387731985 in words is "four trillion, nine hundred twenty-seven billion, three hundred eighty-seven million, seven hundred thirty-one thousand, nine hundred eighty-five".