6440281051 has 2 divisors, whose sum is σ = 6440281052. Its totient is φ = 6440281050.

The previous prime is 6440281039. The next prime is 6440281063. The reversal of 6440281051 is 1501820446.

It is a balanced prime because it is at equal distance from previous prime (6440281039) and next prime (6440281063).

It is a cyclic number.

It is not a de Polignac number, because 6440281051 - 2¹³ = 6440272859 is a prime.

It is not a weakly prime, because it can be changed into another prime (6440284051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220140525 + 3220140526.

It is an arithmetic number, because the mean of its divisors is an integer number (3220140526).

Almost surely, 2^6440281051 is an apocalyptic number.

6440281051 is the 35890-th centered decagonal number.

6440281051 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440281051 is an equidigital number, since it uses as much as digits as its factorization.

6440281051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 6440281051 is about 80251.3616769211. The cubic root of 6440281051 is about 1860.5225582093.

The spelling of 6440281051 in words is "six billion, four hundred forty million, two hundred eighty-one thousand, fifty-one".