12785743823951 has 4 divisors (see below), whose sum is σ = 14612278655952. Its totient is φ = 10959208991952.

The previous prime is 12785743823887. The next prime is 12785743823971. The reversal of 12785743823951 is 15932834758721.

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 12785743823951 - 2⁶ = 12785743823887 is a prime.

It is a super-2 number, since 2×12785743823951² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12785743823971) 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, 913267415990 + ... + 913267416003.

It is an arithmetic number, because the mean of its divisors is an integer number (3653069663988).

Almost surely, 2^{12785743823951} is an apocalyptic number.

12785743823951 is a deficient number, since it is larger than the sum of its proper divisors (1826534832001).

12785743823951 is an equidigital number, since it uses as much as digits as its factorization.

12785743823951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826534832000.

The product of its digits is 101606400, while the sum is 65.

The spelling of 12785743823951 in words is "twelve trillion, seven hundred eighty-five billion, seven hundred forty-three million, eight hundred twenty-three thousand, nine hundred fifty-one".