12840361405 has 8 divisors (see below), whose sum is σ = 16219404000. Its totient is φ = 9731642256.

The previous prime is 12840361403. The next prime is 12840361411. The reversal of 12840361405 is 50416304821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12840361405 - 2¹ = 12840361403 is a prime.

It is a super-2 number, since 2×12840361405² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840361403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67580755 + ... + 67580944.

It is an arithmetic number, because the mean of its divisors is an integer number (2027425500).

Almost surely, 2^12840361405 is an apocalyptic number.

It is an amenable number.

12840361405 is a deficient number, since it is larger than the sum of its proper divisors (3379042595).

12840361405 is a wasteful number, since it uses less digits than its factorization.

12840361405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135161723.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 12840361405 in words is "twelve billion, eight hundred forty million, three hundred sixty-one thousand, four hundred five".