12787578379 has 16 divisors (see below), whose sum is σ = 13531742080. Its totient is φ = 12050700480.

The previous prime is 12787578371. The next prime is 12787578431. The reversal of 12787578379 is 97387578721.

It is a cyclic number.

It is not a de Polignac number, because 12787578379 - 2³ = 12787578371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12787578379.

It is not an unprimeable number, because it can be changed into a prime (12787578371) 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 15 ways as a sum of consecutive naturals, for example, 3251044 + ... + 3254974.

It is an arithmetic number, because the mean of its divisors is an integer number (845733880).

Almost surely, 2^12787578379 is an apocalyptic number.

12787578379 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12787578379 is a deficient number, since it is larger than the sum of its proper divisors (744163701).

12787578379 is a wasteful number, since it uses less digits than its factorization.

12787578379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810.

The product of its digits is 41489280, while the sum is 64.

The spelling of 12787578379 in words is "twelve billion, seven hundred eighty-seven million, five hundred seventy-eight thousand, three hundred seventy-nine".