6465555646 has 8 divisors (see below), whose sum is σ = 10580000184. Its totient is φ = 2938888920.

The previous prime is 6465555643. The next prime is 6465555653.

6465555646 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6465555593 and 6465555602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465555643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146944425 + ... + 146944468.

It is an arithmetic number, because the mean of its divisors is an integer number (1322500023).

Almost surely, 2^6465555646 is an apocalyptic number.

6465555646 is a deficient number, since it is larger than the sum of its proper divisors (4114444538).

6465555646 is a wasteful number, since it uses less digits than its factorization.

6465555646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293888906.

The product of its digits is 12960000, while the sum is 52.

The square root of 6465555646 is about 80408.6789221164. The cubic root of 6465555646 is about 1862.9532271545.

The spelling of 6465555646 in words is "six billion, four hundred sixty-five million, five hundred fifty-five thousand, six hundred forty-six".