6400604645 has 32 divisors (see below), whose sum is σ = 8152513920. Its totient is φ = 4816707840.

The previous prime is 6400604641. The next prime is 6400604699. The reversal of 6400604645 is 5464060046.

It is not a de Polignac number, because 6400604645 - 2² = 6400604641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400604641) 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 31 ways as a sum of consecutive naturals, for example, 943034 + ... + 949796.

It is an arithmetic number, because the mean of its divisors is an integer number (254766060).

Almost surely, 2^6400604645 is an apocalyptic number.

It is an amenable number.

6400604645 is a deficient number, since it is larger than the sum of its proper divisors (1751909275).

6400604645 is a wasteful number, since it uses less digits than its factorization.

6400604645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6965.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 6400604645 is about 80003.7789419975. The cubic root of 6400604645 is about 1856.6940006347.

The spelling of 6400604645 in words is "six billion, four hundred million, six hundred four thousand, six hundred forty-five".