647475438537 has 12 divisors (see below), whose sum is σ = 944883974580. Its totient is φ = 427200288768.

The previous prime is 647475438509. The next prime is 647475438563. The reversal of 647475438537 is 735834574746.

647475438537 is a `hidden beast` number, since 6 + 4 + 7 + 4 + 7 + 543 + 85 + 3 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119039490441 + 528435948096 = 345021^2 + 726936^2 .

It is not a de Polignac number, because 647475438537 - 2¹⁶ = 647475373001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647475433537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370832712 + ... + 370834457.

It is an arithmetic number, because the mean of its divisors is an integer number (78740331215).

Almost surely, 2^647475438537 is an apocalyptic number.

It is an amenable number.

647475438537 is a deficient number, since it is larger than the sum of its proper divisors (297408536043).

647475438537 is a wasteful number, since it uses less digits than its factorization.

647475438537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741667272 (or 741667269 counting only the distinct ones).

The product of its digits is 237081600, while the sum is 63.

The spelling of 647475438537 in words is "six hundred forty-seven billion, four hundred seventy-five million, four hundred thirty-eight thousand, five hundred thirty-seven".