78203831252 has 12 divisors (see below), whose sum is σ = 138784264416. Its totient is φ = 38551184280.

The previous prime is 78203831243. The next prime is 78203831297. The reversal of 78203831252 is 25213830287.

It is a super-2 number, since 2×78203831252² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 137682518 + ... + 137683085.

It is an arithmetic number, because the mean of its divisors is an integer number (11565355368).

Almost surely, 2^78203831252 is an apocalyptic number.

It is an amenable number.

78203831252 is a deficient number, since it is larger than the sum of its proper divisors (60580433164).

78203831252 is a wasteful number, since it uses less digits than its factorization.

78203831252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275365678 (or 275365676 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 78203831252 in words is "seventy-eight billion, two hundred three million, eight hundred thirty-one thousand, two hundred fifty-two".