12780235851 has 8 divisors (see below), whose sum is σ = 17049400464. Its totient is φ = 8515614240.

The previous prime is 12780235807. The next prime is 12780235859. The reversal of 12780235851 is 15853208721.

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

It is not a de Polignac number, because 12780235851 - 2¹⁵ = 12780203083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12780235859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1129180 + ... + 1140441.

It is an arithmetic number, because the mean of its divisors is an integer number (2131175058).

Almost surely, 2^12780235851 is an apocalyptic number.

12780235851 is a deficient number, since it is larger than the sum of its proper divisors (4269164613).

12780235851 is a wasteful number, since it uses less digits than its factorization.

12780235851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271501.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 12780235851 in words is "twelve billion, seven hundred eighty million, two hundred thirty-five thousand, eight hundred fifty-one".