6446511025 has 24 divisors (see below), whose sum is σ = 8083109880. Its totient is φ = 5099804160.

The previous prime is 6446511017. The next prime is 6446511077. The reversal of 6446511025 is 5201156446.

It can be written as a sum of positive squares in 12 ways, for example, as 3612971664 + 2833539361 = 60108^2 + 53231^2 .

It is not a de Polignac number, because 6446511025 - 2³ = 6446511017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 917827 + ... + 924823.

It is an arithmetic number, because the mean of its divisors is an integer number (336796245).

Almost surely, 2^6446511025 is an apocalyptic number.

It is an amenable number.

6446511025 is a deficient number, since it is larger than the sum of its proper divisors (1636598855).

6446511025 is a wasteful number, since it uses less digits than its factorization.

6446511025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7413 (or 7408 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 6446511025 is about 80290.1676732587. The cubic root of 6446511025 is about 1861.1222872987.

The spelling of 6446511025 in words is "six billion, four hundred forty-six million, five hundred eleven thousand, twenty-five".