6465177644 has 24 divisors (see below), whose sum is σ = 11374648320. Its totient is φ = 3215304144.

The previous prime is 6465177533. The next prime is 6465177679. The reversal of 6465177644 is 4467715646.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6465177592 and 6465177601.

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 7 ways as a sum of consecutive naturals, for example, 1356137 + ... + 1360895.

It is an arithmetic number, because the mean of its divisors is an integer number (473943680).

Almost surely, 2^6465177644 is an apocalyptic number.

It is an amenable number.

6465177644 is a deficient number, since it is larger than the sum of its proper divisors (4909470676).

6465177644 is a wasteful number, since it uses less digits than its factorization.

6465177644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509 (or 6507 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 50.

The square root of 6465177644 is about 80406.3283827834. The cubic root of 6465177644 is about 1862.9169212380.

The spelling of 6465177644 in words is "six billion, four hundred sixty-five million, one hundred seventy-seven thousand, six hundred forty-four".