12661112002542 has 16 divisors (see below), whose sum is σ = 25322327823360. Its totient is φ = 4220353364472.

The previous prime is 12661112002501. The next prime is 12661112002589. The reversal of 12661112002542 is 24520021116621.

It is a happy number.

It is a congruent number.

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, 2692942 + ... + 5707377.

It is an arithmetic number, because the mean of its divisors is an integer number (1582645488960).

Almost surely, 2^{12661112002542} is an apocalyptic number.

12661112002542 is an abundant number, since it is smaller than the sum of its proper divisors (12661215820818).

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

12661112002542 is a wasteful number, since it uses less digits than its factorization.

12661112002542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651527.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 12661112002542 in words is "twelve trillion, six hundred sixty-one billion, one hundred twelve million, two thousand, five hundred forty-two".