6513661323 has 12 divisors (see below), whose sum is σ = 10132362240. Its totient is φ = 4008406896.

The previous prime is 6513661321. The next prime is 6513661331. The reversal of 6513661323 is 3231663156.

6513661323 is a `hidden beast` number, since 6 + 5 + 1 + 36 + 613 + 2 + 3 = 666.

It is not a de Polignac number, because 6513661323 - 2¹ = 6513661321 is a prime.

It is a super-2 number, since 2×6513661323² = 84855567661492220658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6513661321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27836043 + ... + 27836276.

It is an arithmetic number, because the mean of its divisors is an integer number (844363520).

Almost surely, 2^6513661323 is an apocalyptic number.

6513661323 is a deficient number, since it is larger than the sum of its proper divisors (3618700917).

6513661323 is a wasteful number, since it uses less digits than its factorization.

6513661323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55672338 (or 55672335 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 6513661323 is about 80707.2569413680. The cubic root of 6513661323 is about 1867.5621260709.

The spelling of 6513661323 in words is "six billion, five hundred thirteen million, six hundred sixty-one thousand, three hundred twenty-three".