6451963847 has 4 divisors (see below), whose sum is σ = 7373672976. Its totient is φ = 5530254720.

The previous prime is 6451963823. The next prime is 6451963849. The reversal of 6451963847 is 7483691546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7483691546 = 2 ⋅3741845773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6451963847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451963849) 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, 460854554 + ... + 460854567.

It is an arithmetic number, because the mean of its divisors is an integer number (1843418244).

Almost surely, 2^6451963847 is an apocalyptic number.

6451963847 is a deficient number, since it is larger than the sum of its proper divisors (921709129).

6451963847 is an equidigital number, since it uses as much as digits as its factorization.

6451963847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921709128.

The product of its digits is 4354560, while the sum is 53.

The square root of 6451963847 is about 80324.1174679187. The cubic root of 6451963847 is about 1861.6468867554.

The spelling of 6451963847 in words is "six billion, four hundred fifty-one million, nine hundred sixty-three thousand, eight hundred forty-seven".