12619768161 has 128 divisors (see below), whose sum is σ = 23256576000. Its totient is φ = 5998164480.

The previous prime is 12619768159. The next prime is 12619768223. The reversal of 12619768161 is 16186791621.

It is a happy number.

It is not a de Polignac number, because 12619768161 - 2¹ = 12619768159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12619768161.

It is not an unprimeable number, because it can be changed into a prime (12619768121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20453125 + ... + 20453741.

It is an arithmetic number, because the mean of its divisors is an integer number (181692000).

Almost surely, 2^12619768161 is an apocalyptic number.

12619768161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12619768161 is a deficient number, since it is larger than the sum of its proper divisors (10636807839).

12619768161 is a wasteful number, since it uses less digits than its factorization.

12619768161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 790 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The spelling of 12619768161 in words is "twelve billion, six hundred nineteen million, seven hundred sixty-eight thousand, one hundred sixty-one".