78840777796 has 27 divisors (see below), whose sum is σ = 151666354623. Its totient is φ = 35833909320.

The previous prime is 78840777781. The next prime is 78840777817. The reversal of 78840777796 is 69777704887.

The square root of 78840777796 is 280786.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6170911 + ... + 6183673.

Almost surely, 2^78840777796 is an apocalyptic number.

78840777796 is the 280786-th square number.

It is an amenable number.

78840777796 is a deficient number, since it is larger than the sum of its proper divisors (72825576827).

78840777796 is an equidigital number, since it uses as much as digits as its factorization.

78840777796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25552 (or 12776 counting only the distinct ones).

The product of its (nonzero) digits is 232339968, while the sum is 70.

The spelling of 78840777796 in words is "seventy-eight billion, eight hundred forty million, seven hundred seventy-seven thousand, seven hundred ninety-six".