12780381147 has 8 divisors (see below), whose sum is σ = 17049584640. Its totient is φ = 8515715880.

The previous prime is 12780381139. The next prime is 12780381161. The reversal of 12780381147 is 74118308721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12780381147 - 2³ = 12780381139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12780381099 and 12780381108.

It is not an unprimeable number, because it can be changed into a prime (12780385147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1127979 + ... + 1139252.

It is an arithmetic number, because the mean of its divisors is an integer number (2131198080).

Almost surely, 2^12780381147 is an apocalyptic number.

12780381147 is a deficient number, since it is larger than the sum of its proper divisors (4269203493).

12780381147 is a wasteful number, since it uses less digits than its factorization.

12780381147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269113.

The product of its (nonzero) digits is 75264, while the sum is 42.

Adding to 12780381147 its reverse (74118308721), we get a palindrome (86898689868).

The spelling of 12780381147 in words is "twelve billion, seven hundred eighty million, three hundred eighty-one thousand, one hundred forty-seven".