12787180409 has 12 divisors (see below), whose sum is σ = 13116440880. Its totient is φ = 12466000800.

The previous prime is 12787180403. The next prime is 12787180459. The reversal of 12787180409 is 90408178721.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12787180409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12787180403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3661154 + ... + 3664644.

It is an arithmetic number, because the mean of its divisors is an integer number (1093036740).

Almost surely, 2^12787180409 is an apocalyptic number.

It is an amenable number.

12787180409 is a deficient number, since it is larger than the sum of its proper divisors (329260471).

12787180409 is an equidigital number, since it uses as much as digits as its factorization.

12787180409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752 (or 5711 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 12787180409 in words is "twelve billion, seven hundred eighty-seven million, one hundred eighty thousand, four hundred nine".