617512531663 has 4 divisors (see below), whose sum is σ = 620647113240. Its totient is φ = 614377950088.

The previous prime is 617512531613. The next prime is 617512531711. The reversal of 617512531663 is 366135215716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 617512531663 - 2¹³ = 617512523471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617512531613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1567290493 + ... + 1567290886.

It is an arithmetic number, because the mean of its divisors is an integer number (155161778310).

Almost surely, 2^617512531663 is an apocalyptic number.

617512531663 is a deficient number, since it is larger than the sum of its proper divisors (3134581577).

617512531663 is a wasteful number, since it uses less digits than its factorization.

617512531663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134581576.

The product of its digits is 680400, while the sum is 46.

The spelling of 617512531663 in words is "six hundred seventeen billion, five hundred twelve million, five hundred thirty-one thousand, six hundred sixty-three".