78846655406850 has 336 divisors, whose sum is σ = 221946457231872. Its totient is φ = 20828526727680.

The previous prime is 78846655406807. The next prime is 78846655406921. The reversal of 78846655406850 is 5860455664887.

78846655406850 is a `hidden beast` number, since 7 + 8 + 8 + 4 + 6 + 6 + 554 + 0 + 68 + 5 + 0 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

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 167 ways as a sum of consecutive naturals, for example, 10078822039 + ... + 10078829861.

Almost surely, 2^{78846655406850} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78846655406850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110973228615936).

78846655406850 is an abundant number, since it is smaller than the sum of its proper divisors (143099801825022).

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

78846655406850 is a wasteful number, since it uses less digits than its factorization.

78846655406850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10413 (or 10393 counting only the distinct ones).

The product of its (nonzero) digits is 1548288000, while the sum is 72.

The spelling of 78846655406850 in words is "seventy-eight trillion, eight hundred forty-six billion, six hundred fifty-five million, four hundred six thousand, eight hundred fifty".