538686688385 has 8 divisors (see below), whose sum is σ = 646437860520. Its totient is φ = 430940127744.

The previous prime is 538686688381. The next prime is 538686688427. The reversal of 538686688385 is 583886686835.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 102378881089 + 436307807296 = 319967^2 + 660536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 538686688385 - 2² = 538686688381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (538686688381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 890450 + ... + 1367579.

It is an arithmetic number, because the mean of its divisors is an integer number (80804732565).

Almost surely, 2^538686688385 is an apocalyptic number.

It is an amenable number.

538686688385 is a deficient number, since it is larger than the sum of its proper divisors (107751172135).

538686688385 is a wasteful number, since it uses less digits than its factorization.

538686688385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305747.

The product of its digits is 1592524800, while the sum is 74.

The spelling of 538686688385 in words is "five hundred thirty-eight billion, six hundred eighty-six million, six hundred eighty-eight thousand, three hundred eighty-five".