5257271643 has 8 divisors (see below), whose sum is σ = 7548902928. Its totient is φ = 3235244064.

The previous prime is 5257271627. The next prime is 5257271681. The reversal of 5257271643 is 3461727525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5257271643 - 2⁴ = 5257271627 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 5257271595 and 5257271604.

It is not an unprimeable number, because it can be changed into a prime (5257271623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67400880 + ... + 67400957.

It is an arithmetic number, because the mean of its divisors is an integer number (943612866).

Almost surely, 2^5257271643 is an apocalyptic number.

5257271643 is a deficient number, since it is larger than the sum of its proper divisors (2291631285).

5257271643 is a wasteful number, since it uses less digits than its factorization.

5257271643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134801853.

The product of its digits is 352800, while the sum is 42.

The square root of 5257271643 is about 72507.0454714575. The cubic root of 5257271643 is about 1738.8153784394.

The spelling of 5257271643 in words is "five billion, two hundred fifty-seven million, two hundred seventy-one thousand, six hundred forty-three".