6404767645 has 16 divisors (see below), whose sum is σ = 7984085760. Its totient is φ = 4928425600.

The previous prime is 6404767643. The next prime is 6404767693. The reversal of 6404767645 is 5467674046.

It is not a de Polignac number, because 6404767645 - 2¹ = 6404767643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404767643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205465 + ... + 234574.

It is an arithmetic number, because the mean of its divisors is an integer number (499005360).

Almost surely, 2^6404767645 is an apocalyptic number.

It is an amenable number.

6404767645 is a deficient number, since it is larger than the sum of its proper divisors (1579318115).

6404767645 is a wasteful number, since it uses less digits than its factorization.

6404767645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440156.

The product of its (nonzero) digits is 3386880, while the sum is 49.

The square root of 6404767645 is about 80029.7922338925. The cubic root of 6404767645 is about 1857.0964491742.

The spelling of 6404767645 in words is "six billion, four hundred four million, seven hundred sixty-seven thousand, six hundred forty-five".