6501017125643 has 4 divisors (see below), whose sum is σ = 6517729252320. Its totient is φ = 6484304998968.

The previous prime is 6501017125639. The next prime is 6501017125697. The reversal of 6501017125643 is 3465217101056.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6501017125643 - 2² = 6501017125639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6501017125643.

It is not an unprimeable number, because it can be changed into a prime (6501017124643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8356062755 + ... + 8356063532.

It is an arithmetic number, because the mean of its divisors is an integer number (1629432313080).

Almost surely, 2^{6501017125643} is an apocalyptic number.

6501017125643 is a deficient number, since it is larger than the sum of its proper divisors (16712126677).

6501017125643 is a wasteful number, since it uses less digits than its factorization.

6501017125643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16712126676.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 6501017125643 in words is "six trillion, five hundred one billion, seventeen million, one hundred twenty-five thousand, six hundred forty-three".