6520973629 has 4 divisors (see below), whose sum is σ = 6612818400. Its totient is φ = 6429128860.

The previous prime is 6520973609. The next prime is 6520973651. The reversal of 6520973629 is 9263790256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6520973629 - 2²¹ = 6518876477 is a prime.

It is a super-2 number, since 2×6520973629² = 85046194140226859282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520973609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45922279 + ... + 45922420.

It is an arithmetic number, because the mean of its divisors is an integer number (1653204600).

Almost surely, 2^6520973629 is an apocalyptic number.

It is an amenable number.

6520973629 is a deficient number, since it is larger than the sum of its proper divisors (91844771).

6520973629 is an equidigital number, since it uses as much as digits as its factorization.

6520973629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91844770.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 6520973629 is about 80752.5456502766. The cubic root of 6520973629 is about 1868.2607131407.

The spelling of 6520973629 in words is "six billion, five hundred twenty million, nine hundred seventy-three thousand, six hundred twenty-nine".