12619785605 has 18 divisors (see below), whose sum is σ = 17618645394. Its totient is φ = 8652361536.

The previous prime is 12619785599. The next prime is 12619785623. The reversal of 12619785605 is 50658791621.

It can be written as a sum of positive squares in 3 ways, for example, as 7081895716 + 5537889889 = 84154^2 + 74417^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12619785605 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1754777 + ... + 1761953.

It is an arithmetic number, because the mean of its divisors is an integer number (978813633).

Almost surely, 2^12619785605 is an apocalyptic number.

It is an amenable number.

12619785605 is a deficient number, since it is larger than the sum of its proper divisors (4998859789).

12619785605 is an frugal number, since it uses more digits than its factorization.

12619785605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14373 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 12619785605 in words is "twelve billion, six hundred nineteen million, seven hundred eighty-five thousand, six hundred five".