12961728305802 has 32 divisors (see below), whose sum is σ = 28811884628160. Its totient is φ = 4319369509680.

The previous prime is 12961728305749. The next prime is 12961728305809. The reversal of 12961728305802 is 20850382716921.

12961728305802 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 1 + 7 + 28 + 30 + 580 + 2 = 666.

12961728305802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (12961728305809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33321288 + ... + 33708035.

It is an arithmetic number, because the mean of its divisors is an integer number (900371394630).

Almost surely, 2^{12961728305802} is an apocalyptic number.

12961728305802 is an abundant number, since it is smaller than the sum of its proper divisors (15850156322358).

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

12961728305802 is a wasteful number, since it uses less digits than its factorization.

12961728305802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67032915 (or 67032909 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 12961728305802 in words is "twelve trillion, nine hundred sixty-one billion, seven hundred twenty-eight million, three hundred five thousand, eight hundred two".