6503120613 has 32 divisors (see below), whose sum is σ = 10606569600. Its totient is φ = 3905107200.

The previous prime is 6503120593. The next prime is 6503120641. The reversal of 6503120613 is 3160213056.

6503120613 is a `hidden beast` number, since 650 + 3 + 1 + 2 + 0 + 6 + 1 + 3 = 666.

It is not a de Polignac number, because 6503120613 - 2⁵ = 6503120581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6503120683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68068 + ... + 132813.

It is an arithmetic number, because the mean of its divisors is an integer number (331455300).

Almost surely, 2^6503120613 is an apocalyptic number.

It is an amenable number.

6503120613 is a deficient number, since it is larger than the sum of its proper divisors (4103448987).

6503120613 is a wasteful number, since it uses less digits than its factorization.

6503120613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201010 (or 201004 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 6503120613 is about 80641.9283809607. The cubic root of 6503120613 is about 1866.5541901864.

Adding to 6503120613 its reverse (3160213056), we get a palindrome (9663333669).

The spelling of 6503120613 in words is "six billion, five hundred three million, one hundred twenty thousand, six hundred thirteen".