78381310283812 has 24 divisors (see below), whose sum is σ = 137312633033856. Its totient is φ = 39149148319008.

The previous prime is 78381310283737. The next prime is 78381310283873. The reversal of 78381310283812 is 21838201318387.

It is a super-2 number, since 2×78381310283812² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14241763 + ... + 18962869.

It is an arithmetic number, because the mean of its divisors is an integer number (5721359709744).

Almost surely, 2^{78381310283812} is an apocalyptic number.

It is an amenable number.

78381310283812 is a deficient number, since it is larger than the sum of its proper divisors (58931322750044).

78381310283812 is a wasteful number, since it uses less digits than its factorization.

78381310283812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725507 (or 4725505 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 78381310283812 in words is "seventy-eight trillion, three hundred eighty-one billion, three hundred ten million, two hundred eighty-three thousand, eight hundred twelve".