78393966316 has 24 divisors (see below), whose sum is σ = 138773640096. Its totient is φ = 38746949760.

The previous prime is 78393966283. The next prime is 78393966353. The reversal of 78393966316 is 61366939387.

It is a super-2 number, since 2×78393966316² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

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, 203281 + ... + 445096.

It is an arithmetic number, because the mean of its divisors is an integer number (5782235004).

Almost surely, 2^78393966316 is an apocalyptic number.

It is an amenable number.

78393966316 is a deficient number, since it is larger than the sum of its proper divisors (60379673780).

78393966316 is a wasteful number, since it uses less digits than its factorization.

78393966316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648729 (or 648727 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 61.

The spelling of 78393966316 in words is "seventy-eight billion, three hundred ninety-three million, nine hundred sixty-six thousand, three hundred sixteen".