78838746020 has 24 divisors (see below), whose sum is σ = 165580506168. Its totient is φ = 31531852800.

The previous prime is 78838746017. The next prime is 78838746037. The reversal of 78838746020 is 2064783887.

It can be written as a sum of positive squares in 4 ways, for example, as 680479396 + 78158266624 = 26086^2 + 279568^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47021 + ... + 399860.

It is an arithmetic number, because the mean of its divisors is an integer number (6899187757).

Almost surely, 2^78838746020 is an apocalyptic number.

It is an amenable number.

78838746020 is an abundant number, since it is smaller than the sum of its proper divisors (86741760148).

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

78838746020 is a wasteful number, since it uses less digits than its factorization.

78838746020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455711 (or 455709 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 78838746020 in words is "seventy-eight billion, eight hundred thirty-eight million, seven hundred forty-six thousand, twenty".