12155415505340 has 48 divisors (see below), whose sum is σ = 25907907261600. Its totient is φ = 4789495974912.

The previous prime is 12155415505339. The next prime is 12155415505369. The reversal of 12155415505340 is 4350551455121.

12155415505340 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 2×12155415505340² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126138296 + ... + 126234624.

It is an arithmetic number, because the mean of its divisors is an integer number (539748067950).

Almost surely, 2^{12155415505340} is an apocalyptic number.

12155415505340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12155415505340 is an abundant number, since it is smaller than the sum of its proper divisors (13752491756260).

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

12155415505340 is a wasteful number, since it uses less digits than its factorization.

12155415505340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190574 (or 190572 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 12155415505340 in words is "twelve trillion, one hundred fifty-five billion, four hundred fifteen million, five hundred five thousand, three hundred forty".