6446253005 has 4 divisors (see below), whose sum is σ = 7735503612. Its totient is φ = 5157002400.

The previous prime is 6446252999. The next prime is 6446253013. The reversal of 6446253005 is 5003526446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5003526446 = 2 ⋅2501763223.

It can be written as a sum of positive squares in 2 ways, for example, as 3890141641 + 2556111364 = 62371^2 + 50558^2 .

It is not a de Polignac number, because 6446253005 - 2¹⁶ = 6446187469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644625296 + ... + 644625305.

It is an arithmetic number, because the mean of its divisors is an integer number (1933875903).

Almost surely, 2^6446253005 is an apocalyptic number.

It is an amenable number.

6446253005 is a deficient number, since it is larger than the sum of its proper divisors (1289250607).

6446253005 is a wasteful number, since it uses less digits than its factorization.

6446253005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289250606.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 6446253005 is about 80288.5608601873. The cubic root of 6446253005 is about 1861.0974566486.

The spelling of 6446253005 in words is "six billion, four hundred forty-six million, two hundred fifty-three thousand, five".