6632451521 has 2 divisors, whose sum is σ = 6632451522. Its totient is φ = 6632451520.

The previous prime is 6632451509. The next prime is 6632451523. The reversal of 6632451521 is 1251542366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4363263025 + 2269188496 = 66055^2 + 47636^2 .

It is a cyclic number.

It is not a de Polignac number, because 6632451521 - 2¹⁰ = 6632450497 is a prime.

Together with 6632451523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6632451523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3316225760 + 3316225761.

It is an arithmetic number, because the mean of its divisors is an integer number (3316225761).

Almost surely, 2^6632451521 is an apocalyptic number.

It is an amenable number.

6632451521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6632451521 is an equidigital number, since it uses as much as digits as its factorization.

6632451521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 6632451521 is about 81439.8644461053. The cubic root of 6632451521 is about 1878.8467652797.

Adding to 6632451521 its reverse (1251542366), we get a palindrome (7883993887).

The spelling of 6632451521 in words is "six billion, six hundred thirty-two million, four hundred fifty-one thousand, five hundred twenty-one".