12328981951 has 16 divisors (see below), whose sum is σ = 14502136320. Its totient is φ = 10333329120.

The previous prime is 12328981919. The next prime is 12328981963. The reversal of 12328981951 is 15918982321.

It is a cyclic number.

It is not a de Polignac number, because 12328981951 - 2⁵ = 12328981919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12328981895 and 12328981904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12328981901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65310 + ... + 170068.

It is an arithmetic number, because the mean of its divisors is an integer number (906383520).

Almost surely, 2^12328981951 is an apocalyptic number.

12328981951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12328981951 is a deficient number, since it is larger than the sum of its proper divisors (2173154369).

12328981951 is a wasteful number, since it uses less digits than its factorization.

12328981951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105606.

The product of its digits is 311040, while the sum is 49.

The spelling of 12328981951 in words is "twelve billion, three hundred twenty-eight million, nine hundred eighty-one thousand, nine hundred fifty-one".