6546443651 has 4 divisors (see below), whose sum is σ = 7141574904. Its totient is φ = 5951312400.

The previous prime is 6546443647. The next prime is 6546443681. The reversal of 6546443651 is 1563446456.

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

It is not a de Polignac number, because 6546443651 - 2² = 6546443647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6546443611) 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, 297565610 + ... + 297565631.

It is an arithmetic number, because the mean of its divisors is an integer number (1785393726).

Almost surely, 2^6546443651 is an apocalyptic number.

6546443651 is a deficient number, since it is larger than the sum of its proper divisors (595131253).

6546443651 is a wasteful number, since it uses less digits than its factorization.

6546443651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595131252.

The product of its digits is 1036800, while the sum is 44.

The square root of 6546443651 is about 80910.0961005485. The cubic root of 6546443651 is about 1870.6899425391.

The spelling of 6546443651 in words is "six billion, five hundred forty-six million, four hundred forty-three thousand, six hundred fifty-one".