7978345005 has 32 divisors (see below), whose sum is σ = 13900579200. Its totient is φ = 3892154112.

The previous prime is 7978344989. The next prime is 7978345027. The reversal of 7978345005 is 5005438797.

It is not a de Polignac number, because 7978345005 - 2⁴ = 7978344989 is a prime.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 474394 + ... + 490923.

It is an arithmetic number, because the mean of its divisors is an integer number (434393100).

Almost surely, 2^7978345005 is an apocalyptic number.

It is an amenable number.

7978345005 is a deficient number, since it is larger than the sum of its proper divisors (5922234195).

7978345005 is a wasteful number, since it uses less digits than its factorization.

7978345005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965373.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The square root of 7978345005 is about 89321.5819665102. The cubic root of 7978345005 is about 1998.1937863705.

The spelling of 7978345005 in words is "seven billion, nine hundred seventy-eight million, three hundred forty-five thousand, five".