6461800847 has 4 divisors (see below), whose sum is σ = 6471262440. Its totient is φ = 6452339256.

The previous prime is 6461800831. The next prime is 6461800907. The reversal of 6461800847 is 7480081646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7480081646 = 2 ⋅3740040823.

It is a cyclic number.

It is not a de Polignac number, because 6461800847 - 2⁴ = 6461800831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6461800798 and 6461800807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461800547) 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, 4729772 + ... + 4731137.

It is an arithmetic number, because the mean of its divisors is an integer number (1617815610).

Almost surely, 2^6461800847 is an apocalyptic number.

6461800847 is a deficient number, since it is larger than the sum of its proper divisors (9461593).

6461800847 is an equidigital number, since it uses as much as digits as its factorization.

6461800847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461592.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 6461800847 is about 80385.3273116431. The cubic root of 6461800847 is about 1862.5925275835.

The spelling of 6461800847 in words is "six billion, four hundred sixty-one million, eight hundred thousand, eight hundred forty-seven".