6521494773 has 16 divisors (see below), whose sum is σ = 9550932480. Its totient is φ = 3939758064.

The previous prime is 6521494753. The next prime is 6521494787. The reversal of 6521494773 is 3774941256.

It is not a de Polignac number, because 6521494773 - 2⁶ = 6521494709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521494703) by changing a digit.

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, 2485911 + ... + 2488532.

It is an arithmetic number, because the mean of its divisors is an integer number (596933280).

Almost surely, 2^6521494773 is an apocalyptic number.

It is an amenable number.

6521494773 is a deficient number, since it is larger than the sum of its proper divisors (3029437707).

6521494773 is a wasteful number, since it uses less digits than its factorization.

6521494773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974488.

The product of its digits is 1270080, while the sum is 48.

The square root of 6521494773 is about 80755.7723819171. The cubic root of 6521494773 is about 1868.3104811141.

The spelling of 6521494773 in words is "six billion, five hundred twenty-one million, four hundred ninety-four thousand, seven hundred seventy-three".