7793663978 has 16 divisors (see below), whose sum is σ = 11834798976. Its totient is φ = 3848758560.

The previous prime is 7793663959. The next prime is 7793663987. The reversal of 7793663978 is 8793663977.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132175 + ... + 1139037.

It is an arithmetic number, because the mean of its divisors is an integer number (739674936).

Almost surely, 2^7793663978 is an apocalyptic number.

7793663978 is a deficient number, since it is larger than the sum of its proper divisors (4041134998).

7793663978 is a wasteful number, since it uses less digits than its factorization.

7793663978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13789.

The product of its digits is 72013536, while the sum is 65.

The square root of 7793663978 is about 88281.7307147974. The cubic root of 7793663978 is about 1982.6553478469.

Subtracting 7793663978 from its reverse (8793663977), we obtain a palindrome (999999999).

The spelling of 7793663978 in words is "seven billion, seven hundred ninety-three million, six hundred sixty-three thousand, nine hundred seventy-eight".