12155835740 has 24 divisors (see below), whose sum is σ = 25529612640. Its totient is φ = 4861885248.

The previous prime is 12155835719. The next prime is 12155835743. The reversal of 12155835740 is 4753855121.

It is a happy number.

12155835740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12155835740² (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 (12155835743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272321 + ... + 313799.

It is an arithmetic number, because the mean of its divisors is an integer number (1063733860).

Almost surely, 2^12155835740 is an apocalyptic number.

12155835740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155835740 is an abundant number, since it is smaller than the sum of its proper divisors (13373776900).

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

12155835740 is a wasteful number, since it uses less digits than its factorization.

12155835740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56141 (or 56139 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 12155835740 in words is "twelve billion, one hundred fifty-five million, eight hundred thirty-five thousand, seven hundred forty".