6478196545 has 12 divisors (see below), whose sum is σ = 8258021244. Its totient is φ = 4877699840.

The previous prime is 6478196533. The next prime is 6478196561. The reversal of 6478196545 is 5456918746.

It can be written as a sum of positive squares in 6 ways, for example, as 1327104 + 6476869441 = 1152^2 + 80479^2 .

It is not a de Polignac number, because 6478196545 - 2⁹ = 6478196033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2240146 + ... + 2243035.

It is an arithmetic number, because the mean of its divisors is an integer number (688168437).

Almost surely, 2^6478196545 is an apocalyptic number.

It is an amenable number.

6478196545 is a deficient number, since it is larger than the sum of its proper divisors (1779824699).

6478196545 is a wasteful number, since it uses less digits than its factorization.

6478196545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483220 (or 4483203 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The square root of 6478196545 is about 80487.2446105593. The cubic root of 6478196545 is about 1864.1665321544.

The spelling of 6478196545 in words is "six billion, four hundred seventy-eight million, one hundred ninety-six thousand, five hundred forty-five".