6506601561 has 16 divisors (see below), whose sum is σ = 9681883200. Its totient is φ = 4318621344.

The previous prime is 6506601527. The next prime is 6506601581. The reversal of 6506601561 is 1651066056.

It is not a de Polignac number, because 6506601561 - 2¹³ = 6506593369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6506601581) 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, 524676 + ... + 536933.

It is an arithmetic number, because the mean of its divisors is an integer number (605117700).

Almost surely, 2^6506601561 is an apocalyptic number.

It is an amenable number.

6506601561 is a deficient number, since it is larger than the sum of its proper divisors (3175281639).

6506601561 is a wasteful number, since it uses less digits than its factorization.

6506601561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061845 (or 1061839 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 6506601561 is about 80663.5082363766. The cubic root of 6506601561 is about 1866.8871697673.

The spelling of 6506601561 in words is "six billion, five hundred six million, six hundred one thousand, five hundred sixty-one".