12478907791 has 16 divisors (see below), whose sum is σ = 14366376000. Its totient is φ = 10617723648.

The previous prime is 12478907789. The next prime is 12478907813. The reversal of 12478907791 is 19770987421.

It is not a de Polignac number, because 12478907791 - 2¹ = 12478907789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12478907711) 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, 2363931 + ... + 2369203.

It is an arithmetic number, because the mean of its divisors is an integer number (897898500).

Almost surely, 2^12478907791 is an apocalyptic number.

12478907791 is a deficient number, since it is larger than the sum of its proper divisors (1887468209).

12478907791 is a wasteful number, since it uses less digits than its factorization.

12478907791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7698.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The spelling of 12478907791 in words is "twelve billion, four hundred seventy-eight million, nine hundred seven thousand, seven hundred ninety-one".