6515643763 has 4 divisors (see below), whose sum is σ = 6517586880. Its totient is φ = 6513700648.

The previous prime is 6515643749. The next prime is 6515643833. The reversal of 6515643763 is 3673465156.

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 6515643763 - 2¹³ = 6515635571 is a prime.

It is a super-2 number, since 2×6515643763² = 84907227292641600338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6515643713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966520 + ... + 973237.

It is an arithmetic number, because the mean of its divisors is an integer number (1629396720).

Almost surely, 2^6515643763 is an apocalyptic number.

6515643763 is a deficient number, since it is larger than the sum of its proper divisors (1943117).

6515643763 is a wasteful number, since it uses less digits than its factorization.

6515643763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943116.

The product of its digits is 1360800, while the sum is 46.

The square root of 6515643763 is about 80719.5376783093. The cubic root of 6515643763 is about 1867.7515717165.

The spelling of 6515643763 in words is "six billion, five hundred fifteen million, six hundred forty-three thousand, seven hundred sixty-three".