12785719651 has 4 divisors (see below), whose sum is σ = 12871530000. Its totient is φ = 12699909304.

The previous prime is 12785719637. The next prime is 12785719663. The reversal of 12785719651 is 15691758721.

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 12785719651 - 2¹⁵ = 12785686883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12785719451) 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, 42904951 + ... + 42905248.

It is an arithmetic number, because the mean of its divisors is an integer number (3217882500).

Almost surely, 2^12785719651 is an apocalyptic number.

12785719651 is a deficient number, since it is larger than the sum of its proper divisors (85810349).

12785719651 is an equidigital number, since it uses as much as digits as its factorization.

12785719651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85810348.

The product of its digits is 1058400, while the sum is 52.

The spelling of 12785719651 in words is "twelve billion, seven hundred eighty-five million, seven hundred nineteen thousand, six hundred fifty-one".