613640606243 has 4 divisors (see below), whose sum is σ = 701303550000. Its totient is φ = 525977662488.

The previous prime is 613640606237. The next prime is 613640606251. The reversal of 613640606243 is 342606046316.

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 613640606243 - 2⁶ = 613640606179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 613640606243.

It is not an unprimeable number, because it can be changed into a prime (613640606203) 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, 43831471868 + ... + 43831471881.

It is an arithmetic number, because the mean of its divisors is an integer number (175325887500).

Almost surely, 2^613640606243 is an apocalyptic number.

613640606243 is a deficient number, since it is larger than the sum of its proper divisors (87662943757).

613640606243 is an equidigital number, since it uses as much as digits as its factorization.

613640606243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87662943756.

The product of its (nonzero) digits is 373248, while the sum is 41.

The spelling of 613640606243 in words is "six hundred thirteen billion, six hundred forty million, six hundred six thousand, two hundred forty-three".