617646100105 has 4 divisors (see below), whose sum is σ = 741175320132. Its totient is φ = 494116880080.

The previous prime is 617646100079. The next prime is 617646100111. The reversal of 617646100105 is 501001646716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 212543128576 + 405102971529 = 461024^2 + 636477^2 .

It is not a de Polignac number, because 617646100105 - 2¹⁷ = 617645969033 is a prime.

It is a super-2 number, since 2×617646100105² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61764610006 + ... + 61764610015.

It is an arithmetic number, because the mean of its divisors is an integer number (185293830033).

Almost surely, 2^617646100105 is an apocalyptic number.

It is an amenable number.

617646100105 is a deficient number, since it is larger than the sum of its proper divisors (123529220027).

617646100105 is a wasteful number, since it uses less digits than its factorization.

617646100105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123529220026.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 617646100105 in words is "six hundred seventeen billion, six hundred forty-six million, one hundred thousand, one hundred five".