6501561501 has 8 divisors (see below), whose sum is σ = 9045650880. Its totient is φ = 4145923232.

The previous prime is 6501561467. The next prime is 6501561503. The reversal of 6501561501 is 1051651056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6501561501 - 2¹⁰ = 6501560477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501561503) 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 7 ways as a sum of consecutive naturals, for example, 47112696 + ... + 47112833.

It is an arithmetic number, because the mean of its divisors is an integer number (1130706360).

Almost surely, 2^6501561501 is an apocalyptic number.

It is an amenable number.

6501561501 is a deficient number, since it is larger than the sum of its proper divisors (2544089379).

6501561501 is a wasteful number, since it uses less digits than its factorization.

6501561501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94225555.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 6501561501 is about 80632.2609195600. The cubic root of 6501561501 is about 1866.4050105433.

The spelling of 6501561501 in words is "six billion, five hundred one million, five hundred sixty-one thousand, five hundred one".