14661501521 has 2 divisors, whose sum is σ = 14661501522. Its totient is φ = 14661501520.

The previous prime is 14661501469. The next prime is 14661501523. The reversal of 14661501521 is 12510516641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7649951296 + 7011550225 = 87464^2 + 83735^2 .

It is a cyclic number.

It is not a de Polignac number, because 14661501521 - 2¹⁸ = 14661239377 is a prime.

Together with 14661501523, 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 (14661501523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7330750760 + 7330750761.

It is an arithmetic number, because the mean of its divisors is an integer number (7330750761).

Almost surely, 2^14661501521 is an apocalyptic number.

It is an amenable number.

14661501521 is a deficient number, since it is larger than the sum of its proper divisors (1).

14661501521 is an equidigital number, since it uses as much as digits as its factorization.

14661501521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 14661501521 in words is "fourteen billion, six hundred sixty-one million, five hundred one thousand, five hundred twenty-one".