78395966512 has 10 divisors (see below), whose sum is σ = 151892185148. Its totient is φ = 39197983248.

The previous prime is 78395966507. The next prime is 78395966521. The reversal of 78395966512 is 21566959387.

It is a super-2 number, since 2×78395966512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2449873938 + ... + 2449873969.

Almost surely, 2^78395966512 is an apocalyptic number.

It is an amenable number.

78395966512 is a deficient number, since it is larger than the sum of its proper divisors (73496218636).

78395966512 is a wasteful number, since it uses less digits than its factorization.

78395966512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899747915 (or 4899747909 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 61.

The spelling of 78395966512 in words is "seventy-eight billion, three hundred ninety-five million, nine hundred sixty-six thousand, five hundred twelve".