78692702020 has 12 divisors (see below), whose sum is σ = 165254674284. Its totient is φ = 31477080800.

The previous prime is 78692702017. The next prime is 78692702063. The reversal of 78692702020 is 2020729687.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31770210564 + 46922491456 = 178242^2 + 216616^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967317531 + ... + 1967317570.

It is an arithmetic number, because the mean of its divisors is an integer number (13771222857).

Almost surely, 2^78692702020 is an apocalyptic number.

It is an amenable number.

78692702020 is an abundant number, since it is smaller than the sum of its proper divisors (86561972264).

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

78692702020 is a wasteful number, since it uses less digits than its factorization.

78692702020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934635110 (or 3934635108 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 78692702020 in words is "seventy-eight billion, six hundred ninety-two million, seven hundred two thousand, twenty".