12381777238 has 16 divisors (see below), whose sum is σ = 18607080960. Its totient is φ = 6179429736.

The previous prime is 12381777223. The next prime is 12381777257. The reversal of 12381777238 is 83277718321.

It is a junction number, because it is equal to n+sod(n) for n = 12381777191 and 12381777200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3216631 + ... + 3220477.

It is an arithmetic number, because the mean of its divisors is an integer number (1162942560).

Almost surely, 2^12381777238 is an apocalyptic number.

12381777238 is a deficient number, since it is larger than the sum of its proper divisors (6225303722).

12381777238 is a wasteful number, since it uses less digits than its factorization.

12381777238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411.

The product of its digits is 790272, while the sum is 49.

The spelling of 12381777238 in words is "twelve billion, three hundred eighty-one million, seven hundred seventy-seven thousand, two hundred thirty-eight".