6432615649 has 4 divisors (see below), whose sum is σ = 6606470164. Its totient is φ = 6258761136.

The previous prime is 6432615647. The next prime is 6432615667. The reversal of 6432615649 is 9465162346.

6432615649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4368549025 + 2064066624 = 66095^2 + 45432^2 .

It is a cyclic number.

It is not a de Polignac number, because 6432615649 - 2¹ = 6432615647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6432615599 and 6432615608.

It is not an unprimeable number, because it can be changed into a prime (6432615641) 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, 86927202 + ... + 86927275.

It is an arithmetic number, because the mean of its divisors is an integer number (1651617541).

Almost surely, 2^6432615649 is an apocalyptic number.

It is an amenable number.

6432615649 is a deficient number, since it is larger than the sum of its proper divisors (173854515).

6432615649 is a wasteful number, since it uses less digits than its factorization.

6432615649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173854514.

The product of its digits is 933120, while the sum is 46.

The square root of 6432615649 is about 80203.5887538706. The cubic root of 6432615649 is about 1859.7841165598.

The spelling of 6432615649 in words is "six billion, four hundred thirty-two million, six hundred fifteen thousand, six hundred forty-nine".