6501440063 has 8 divisors (see below), whose sum is σ = 6715376256. Its totient is φ = 6287767200.

The previous prime is 6501440027. The next prime is 6501440087. The reversal of 6501440063 is 3600441056.

It is a happy number.

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

It is not a de Polignac number, because 6501440063 - 2¹⁸ = 6501177919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501445063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15008 + ... + 115013.

It is an arithmetic number, because the mean of its divisors is an integer number (839422032).

Almost surely, 2^6501440063 is an apocalyptic number.

6501440063 is a deficient number, since it is larger than the sum of its proper divisors (213936193).

6501440063 is a wasteful number, since it uses less digits than its factorization.

6501440063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131665.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6501440063 is about 80631.5078799845. The cubic root of 6501440063 is about 1866.3933900578.

The spelling of 6501440063 in words is "six billion, five hundred one million, four hundred forty thousand, sixty-three".