6513815842 has 8 divisors (see below), whose sum is σ = 9904569516. Its totient is φ = 3212292672.

The previous prime is 6513815801. The next prime is 6513815879. The reversal of 6513815842 is 2485183156.

It can be written as a sum of positive squares in 2 ways, for example, as 6510714721 + 3101121 = 80689^2 + 1761^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22307443 + ... + 22307734.

Almost surely, 2^6513815842 is an apocalyptic number.

6513815842 is a deficient number, since it is larger than the sum of its proper divisors (3390753674).

6513815842 is a wasteful number, since it uses less digits than its factorization.

6513815842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44615252.

The product of its digits is 230400, while the sum is 43.

The square root of 6513815842 is about 80708.2142163981. The cubic root of 6513815842 is about 1867.5768935745.

Adding to 6513815842 its reverse (2485183156), we get a palindrome (8998998998).

The spelling of 6513815842 in words is "six billion, five hundred thirteen million, eight hundred fifteen thousand, eight hundred forty-two".