6461814561 has 16 divisors (see below), whose sum is σ = 8925143040. Its totient is φ = 4154164560.

The previous prime is 6461814523. The next prime is 6461814587. The reversal of 6461814561 is 1654181646.

It is not a de Polignac number, because 6461814561 - 2⁶ = 6461814497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6461894561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96441 + ... + 149078.

It is an arithmetic number, because the mean of its divisors is an integer number (557821440).

Almost surely, 2^6461814561 is an apocalyptic number.

It is an amenable number.

6461814561 is a deficient number, since it is larger than the sum of its proper divisors (2463328479).

6461814561 is a wasteful number, since it uses less digits than its factorization.

6461814561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245836.

The product of its digits is 138240, while the sum is 42.

The square root of 6461814561 is about 80385.4126132347. The cubic root of 6461814561 is about 1862.5938452541.

The spelling of 6461814561 in words is "six billion, four hundred sixty-one million, eight hundred fourteen thousand, five hundred sixty-one".