6513061643 has 8 divisors (see below), whose sum is σ = 7105928256. Its totient is φ = 5920323400.

The previous prime is 6513061637. The next prime is 6513061651. The reversal of 6513061643 is 3461603156.

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 6513061643 - 2¹² = 6513057547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6513061603) 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, 96380 + ... + 149382.

It is an arithmetic number, because the mean of its divisors is an integer number (888241032).

Almost surely, 2^6513061643 is an apocalyptic number.

6513061643 is a deficient number, since it is larger than the sum of its proper divisors (592866613).

6513061643 is a wasteful number, since it uses less digits than its factorization.

6513061643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64185.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 6513061643 is about 80703.5417004731. The cubic root of 6513061643 is about 1867.5048119649.

Adding to 6513061643 its reverse (3461603156), we get a palindrome (9974664799).

The spelling of 6513061643 in words is "six billion, five hundred thirteen million, sixty-one thousand, six hundred forty-three".