7794334978 has 12 divisors (see below), whose sum is σ = 11763749718. Its totient is φ = 3873232080.

The previous prime is 7794334943. The next prime is 7794335041. The reversal of 7794334978 is 8794334977.

7794334978 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6147030409 + 1647304569 = 78403^2 + 40587^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20203 + ... + 126478.

Almost surely, 2^7794334978 is an apocalyptic number.

7794334978 is a deficient number, since it is larger than the sum of its proper divisors (3969414740).

7794334978 is a wasteful number, since it uses less digits than its factorization.

7794334978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147009 (or 146846 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 61.

The square root of 7794334978 is about 88285.5309662914. The cubic root of 7794334978 is about 1982.7122454997.

Subtracting 7794334978 from its reverse (8794334977), we obtain a palindrome (999999999).

The spelling of 7794334978 in words is "seven billion, seven hundred ninety-four million, three hundred thirty-four thousand, nine hundred seventy-eight".