613545666061 has 8 divisors (see below), whose sum is σ = 650002200120. Its totient is φ = 577129755648.

The previous prime is 613545666047. The next prime is 613545666079. The reversal of 613545666061 is 160666545316.

It can be written as a sum of positive squares in 4 ways, for example, as 371081997225 + 242463668836 = 609165^2 + 492406^2 .

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 613545666061 - 2¹¹ = 613545664013 is a prime.

It is a super-2 number, since 2×613545666061² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 613545665996 and 613545666014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613545666011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10124806 + ... + 10185223.

It is an arithmetic number, because the mean of its divisors is an integer number (81250275015).

Almost surely, 2^613545666061 is an apocalyptic number.

It is an amenable number.

613545666061 is a deficient number, since it is larger than the sum of its proper divisors (36456534059).

613545666061 is a wasteful number, since it uses less digits than its factorization.

613545666061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20311823.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 613545666061 in words is "six hundred thirteen billion, five hundred forty-five million, six hundred sixty-six thousand, sixty-one".