12409779375 has 240 divisors, whose sum is σ = 27228883968. Its totient is φ = 5322240000.

The previous prime is 12409779359. The next prime is 12409779379. The reversal of 12409779375 is 57397790421.

12409779375 is a `hidden beast` number, since 12 + 409 + 77 + 93 + 75 = 666.

It is not a de Polignac number, because 12409779375 - 2⁴ = 12409779359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409779379) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 64299279 + ... + 64299471.

Almost surely, 2^12409779375 is an apocalyptic number.

12409779375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12409779375 is an abundant number, since it is smaller than the sum of its proper divisors (14819104593).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12409779375 is a wasteful number, since it uses less digits than its factorization.

12409779375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 54.

The spelling of 12409779375 in words is "twelve billion, four hundred nine million, seven hundred seventy-nine thousand, three hundred seventy-five".