617406532521 has 16 divisors (see below), whose sum is σ = 867591013440. Its totient is φ = 389465979840.

The previous prime is 617406532507. The next prime is 617406532543. The reversal of 617406532521 is 125235604716.

It is a de Polignac number, because none of the positive numbers 2^k-617406532521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (617406532571) 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 15 ways as a sum of consecutive naturals, for example, 6549850 + ... + 6643443.

It is an arithmetic number, because the mean of its divisors is an integer number (54224438340).

Almost surely, 2^617406532521 is an apocalyptic number.

It is an amenable number.

617406532521 is a deficient number, since it is larger than the sum of its proper divisors (250184480919).

617406532521 is a wasteful number, since it uses less digits than its factorization.

617406532521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13194136.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 617406532521 in words is "six hundred seventeen billion, four hundred six million, five hundred thirty-two thousand, five hundred twenty-one".