12040479399 has 16 divisors (see below), whose sum is σ = 17324421632. Its totient is φ = 7394299488.

The previous prime is 12040479383. The next prime is 12040479403. The reversal of 12040479399 is 99397404021.

It is a happy number.

It is not a de Polignac number, because 12040479399 - 2⁴ = 12040479383 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 (12040479359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297979 + ... + 335964.

It is an arithmetic number, because the mean of its divisors is an integer number (1082776352).

Almost surely, 2^12040479399 is an apocalyptic number.

12040479399 is a deficient number, since it is larger than the sum of its proper divisors (5283942233).

12040479399 is a wasteful number, since it uses less digits than its factorization.

12040479399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634446.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 12040479399 in words is "twelve billion, forty million, four hundred seventy-nine thousand, three hundred ninety-nine".