612118634605 has 4 divisors (see below), whose sum is σ = 734542361532. Its totient is φ = 489694907680.

The previous prime is 612118634591. The next prime is 612118634651. The reversal of 612118634605 is 506436811216.

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 370913886729 + 241204747876 = 609027^2 + 491126^2 .

It is not a de Polignac number, because 612118634605 - 2²⁷ = 611984416877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61211863456 + ... + 61211863465.

It is an arithmetic number, because the mean of its divisors is an integer number (183635590383).

Almost surely, 2^612118634605 is an apocalyptic number.

It is an amenable number.

612118634605 is a deficient number, since it is larger than the sum of its proper divisors (122423726927).

612118634605 is a wasteful number, since it uses less digits than its factorization.

612118634605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122423726926.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 612118634605 in words is "six hundred twelve billion, one hundred eighteen million, six hundred thirty-four thousand, six hundred five".