12291808349540 has 24 divisors (see below), whose sum is σ = 26935093080000. Its totient is φ = 4702952759648.

The previous prime is 12291808349419. The next prime is 12291808349551. The reversal of 12291808349540 is 4594380819221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13360660790 + ... + 13360661709.

It is an arithmetic number, because the mean of its divisors is an integer number (1122295545000).

Almost surely, 2^{12291808349540} is an apocalyptic number.

12291808349540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12291808349540 is an abundant number, since it is smaller than the sum of its proper divisors (14643284730460).

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

12291808349540 is a wasteful number, since it uses less digits than its factorization.

12291808349540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26721322531 (or 26721322529 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 12291808349540 in words is "twelve trillion, two hundred ninety-one billion, eight hundred eight million, three hundred forty-nine thousand, five hundred forty".