7678451979 has 12 divisors (see below), whose sum is σ = 12099379032. Its totient is φ = 4653607200.

The previous prime is 7678451953. The next prime is 7678451983. The reversal of 7678451979 is 9791548767.

It is not a de Polignac number, because 7678451979 - 2⁸ = 7678451723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7678451279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38779962 + ... + 38780159.

It is an arithmetic number, because the mean of its divisors is an integer number (1008281586).

Almost surely, 2^7678451979 is an apocalyptic number.

7678451979 is a deficient number, since it is larger than the sum of its proper divisors (4420927053).

7678451979 is a wasteful number, since it uses less digits than its factorization.

7678451979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77560138 (or 77560135 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 63.

The square root of 7678451979 is about 87626.7766096642. The cubic root of 7678451979 is about 1972.8370898596.

The spelling of 7678451979 in words is "seven billion, six hundred seventy-eight million, four hundred fifty-one thousand, nine hundred seventy-nine".