617712340505 has 16 divisors (see below), whose sum is σ = 798433251840. Its totient is φ = 456066038208.

The previous prime is 617712340397. The next prime is 617712340507. The reversal of 617712340505 is 505043217716.

It is a cyclic number.

It is not a de Polignac number, because 617712340505 - 2¹⁰ = 617712339481 is a prime.

It is a super-2 number, since 2×617712340505² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (617712340507) 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 15 ways as a sum of consecutive naturals, for example, 615437 + ... + 1270506.

It is an arithmetic number, because the mean of its divisors is an integer number (49902078240).

Almost surely, 2^617712340505 is an apocalyptic number.

617712340505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

617712340505 is a deficient number, since it is larger than the sum of its proper divisors (180720911335).

617712340505 is a wasteful number, since it uses less digits than its factorization.

617712340505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891000.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 617712340505 in words is "six hundred seventeen billion, seven hundred twelve million, three hundred forty thousand, five hundred five".