78186805541286 has 128 divisors (see below), whose sum is σ = 179195275413504. Its totient is φ = 22557709025280.

The previous prime is 78186805541249. The next prime is 78186805541297. The reversal of 78186805541286 is 68214550868187.

78186805541286 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78186805541286² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 78186805541286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 109272951 + ... + 109986141.

It is an arithmetic number, because the mean of its divisors is an integer number (1399963089168).

Almost surely, 2^{78186805541286} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78186805541286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89597637706752).

78186805541286 is an abundant number, since it is smaller than the sum of its proper divisors (101008469872218).

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

78186805541286 is a wasteful number, since it uses less digits than its factorization.

78186805541286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714438.

The product of its (nonzero) digits is 206438400, while the sum is 69.

The spelling of 78186805541286 in words is "seventy-eight trillion, one hundred eighty-six billion, eight hundred five million, five hundred forty-one thousand, two hundred eighty-six".