61686928806102 has 48 divisors (see below), whose sum is σ = 140402114143200. Its totient is φ = 19536294134016.

The previous prime is 61686928806089. The next prime is 61686928806163. The reversal of 61686928806102 is 20160882968616.

61686928806102 is a `hidden beast` number, since 6 + 1 + 6 + 8 + 6 + 9 + 2 + 8 + 8 + 0 + 610 + 2 = 666.

61686928806102 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 2×61686928806102² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61686928806102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 499945843 + ... + 500069214.

It is an arithmetic number, because the mean of its divisors is an integer number (2925044044650).

Almost surely, 2^{61686928806102} is an apocalyptic number.

61686928806102 is an abundant number, since it is smaller than the sum of its proper divisors (78715185337098).

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

61686928806102 is a wasteful number, since it uses less digits than its factorization.

61686928806102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000015237 (or 1000015234 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 61686928806102 in words is "sixty-one trillion, six hundred eighty-six billion, nine hundred twenty-eight million, eight hundred six thousand, one hundred two".