6521046445 has 16 divisors (see below), whose sum is σ = 7864646400. Its totient is φ = 5190640000.

The previous prime is 6521046431. The next prime is 6521046491. The reversal of 6521046445 is 5446401256.

It is not a de Polignac number, because 6521046445 - 2¹⁵ = 6521013677 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 927945 + ... + 934945.

It is an arithmetic number, because the mean of its divisors is an integer number (491540400).

Almost surely, 2^6521046445 is an apocalyptic number.

It is an amenable number.

6521046445 is a deficient number, since it is larger than the sum of its proper divisors (1343599955).

6521046445 is a wasteful number, since it uses less digits than its factorization.

6521046445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7916.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 6521046445 is about 80752.9965078696. The cubic root of 6521046445 is about 1868.2676670494.

The spelling of 6521046445 in words is "six billion, five hundred twenty-one million, forty-six thousand, four hundred forty-five".