78833316421620 has 120 divisors (see below), whose sum is σ = 248093140500744. Its totient is φ = 20955053942784.

The previous prime is 78833316421597. The next prime is 78833316421621. The reversal of 78833316421620 is 2612461333887.

It is a happy number.

78833316421620 is a `hidden beast` number, since 7 + 8 + 8 + 3 + 3 + 3 + 1 + 6 + 4 + 2 + 1 + 620 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 863639379684 + 77969677041936 = 929322^2 + 8830044^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78833316421621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 77228629 + ... + 78242748.

Almost surely, 2^{78833316421620} is an apocalyptic number.

It is an amenable number.

78833316421620 is an abundant number, since it is smaller than the sum of its proper divisors (169259824079124).

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

78833316421620 is a wasteful number, since it uses less digits than its factorization.

78833316421620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155471711 (or 155471700 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 78833316421620 in words is "seventy-eight trillion, eight hundred thirty-three billion, three hundred sixteen million, four hundred twenty-one thousand, six hundred twenty".