12135501405 has 48 divisors (see below), whose sum is σ = 22121334144. Its totient is φ = 6381063360.

The previous prime is 12135501403. The next prime is 12135501449. The reversal of 12135501405 is 50410553121.

12135501405 is a `hidden beast` number, since 121 + 35 + 501 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 12135501405 - 2¹ = 12135501403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135501403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15927 + ... + 156603.

It is an arithmetic number, because the mean of its divisors is an integer number (460861128).

Almost surely, 2^12135501405 is an apocalyptic number.

12135501405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12135501405 is a deficient number, since it is larger than the sum of its proper divisors (9985832739).

12135501405 is an equidigital number, since it uses as much as digits as its factorization.

12135501405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140768 (or 140756 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 12135501405 in words is "twelve billion, one hundred thirty-five million, five hundred one thousand, four hundred five".