6445764457 has 16 divisors (see below), whose sum is σ = 7200864000. Its totient is φ = 5719064400.

The previous prime is 6445764427. The next prime is 6445764463. The reversal of 6445764457 is 7544675446.

It is a cyclic number.

It is not a de Polignac number, because 6445764457 - 2¹¹ = 6445762409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6445764407) 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, 704482 + ... + 713572.

It is an arithmetic number, because the mean of its divisors is an integer number (450054000).

Almost surely, 2^6445764457 is an apocalyptic number.

It is an amenable number.

6445764457 is a deficient number, since it is larger than the sum of its proper divisors (755099543).

6445764457 is a wasteful number, since it uses less digits than its factorization.

6445764457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10644.

The product of its digits is 11289600, while the sum is 52.

The square root of 6445764457 is about 80285.5183516928. The cubic root of 6445764457 is about 1861.0504392360.

The spelling of 6445764457 in words is "six billion, four hundred forty-five million, seven hundred sixty-four thousand, four hundred fifty-seven".