6465620331 has 6 divisors (see below), whose sum is σ = 9339229380. Its totient is φ = 4310413548.

The previous prime is 6465620323. The next prime is 6465620341. The reversal of 6465620331 is 1330265646.

6465620331 is a `hidden beast` number, since 64 + 6 + 562 + 0 + 3 + 31 = 666.

6465620331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6465620331 - 2³ = 6465620323 is a prime.

It is a super-2 number, since 2×6465620331² = 83608492529281099122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6465620311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359201121 + ... + 359201138.

It is an arithmetic number, because the mean of its divisors is an integer number (1556538230).

Almost surely, 2^6465620331 is an apocalyptic number.

6465620331 is a deficient number, since it is larger than the sum of its proper divisors (2873609049).

6465620331 is a wasteful number, since it uses less digits than its factorization.

6465620331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718402265 (or 718402262 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 6465620331 is about 80409.0811475918. The cubic root of 6465620331 is about 1862.9594398057.

Adding to 6465620331 its reverse (1330265646), we get a palindrome (7795885977).

The spelling of 6465620331 in words is "six billion, four hundred sixty-five million, six hundred twenty thousand, three hundred thirty-one".