6440053531 has 2 divisors, whose sum is σ = 6440053532. Its totient is φ = 6440053530.

The previous prime is 6440053489. The next prime is 6440053549. The reversal of 6440053531 is 1353500446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6440053531 - 2¹¹ = 6440051483 is a prime.

It is a super-2 number, since 2×6440053531² = 82948578964291135922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6440053493 and 6440053502.

It is not a weakly prime, because it can be changed into another prime (6440053031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220026765 + 3220026766.

It is an arithmetic number, because the mean of its divisors is an integer number (3220026766).

Almost surely, 2^6440053531 is an apocalyptic number.

6440053531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440053531 is an equidigital number, since it uses as much as digits as its factorization.

6440053531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 6440053531 is about 80249.9441183606. The cubic root of 6440053531 is about 1860.5006486542.

Adding to 6440053531 its reverse (1353500446), we get a palindrome (7793553977).

The spelling of 6440053531 in words is "six billion, four hundred forty million, fifty-three thousand, five hundred thirty-one".