6488374645 has 4 divisors (see below), whose sum is σ = 7786049580. Its totient is φ = 5190699712.

The previous prime is 6488374643. The next prime is 6488374699. The reversal of 6488374645 is 5464738846.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4427305444 + 2061069201 = 66538^2 + 45399^2 .

It is a cyclic number.

It is not a de Polignac number, because 6488374645 - 2¹ = 6488374643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6488374643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 648837460 + ... + 648837469.

It is an arithmetic number, because the mean of its divisors is an integer number (1946512395).

Almost surely, 2^6488374645 is an apocalyptic number.

It is an amenable number.

6488374645 is a deficient number, since it is larger than the sum of its proper divisors (1297674935).

6488374645 is a wasteful number, since it uses less digits than its factorization.

6488374645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297674934.

The product of its digits is 15482880, while the sum is 55.

The square root of 6488374645 is about 80550.4478261915. The cubic root of 6488374645 is about 1865.1423050257.

The spelling of 6488374645 in words is "six billion, four hundred eighty-eight million, three hundred seventy-four thousand, six hundred forty-five".