5491643447 has 2 divisors, whose sum is σ = 5491643448. Its totient is φ = 5491643446.

The previous prime is 5491643441. The next prime is 5491643453. The reversal of 5491643447 is 7443461945.

It is a balanced prime because it is at equal distance from previous prime (5491643441) and next prime (5491643453).

It is a cyclic number.

It is not a de Polignac number, because 5491643447 - 2³⁰ = 4417901623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5491643441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2745821723 + 2745821724.

It is an arithmetic number, because the mean of its divisors is an integer number (2745821724).

Almost surely, 2^5491643447 is an apocalyptic number.

5491643447 is a deficient number, since it is larger than the sum of its proper divisors (1).

5491643447 is an equidigital number, since it uses as much as digits as its factorization.

5491643447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 47.

The square root of 5491643447 is about 74105.6235855282. The cubic root of 5491643447 is about 1764.2797283636.

The spelling of 5491643447 in words is "five billion, four hundred ninety-one million, six hundred forty-three thousand, four hundred forty-seven".