16249004521 has 2 divisors, whose sum is σ = 16249004522. Its totient is φ = 16249004520.

The previous prime is 16249004489. The next prime is 16249004531. The reversal of 16249004521 is 12540094261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15677794521 + 571210000 = 125211^2 + 23900^2 .

It is a cyclic number.

It is not a de Polignac number, because 16249004521 - 2⁵ = 16249004489 is a prime.

It is not a weakly prime, because it can be changed into another prime (16249004531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8124502260 + 8124502261.

It is an arithmetic number, because the mean of its divisors is an integer number (8124502261).

Almost surely, 2^16249004521 is an apocalyptic number.

It is an amenable number.

16249004521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16249004521 is an equidigital number, since it uses as much as digits as its factorization.

16249004521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 16249004521 its reverse (12540094261), we get a palindrome (28789098782).

The spelling of 16249004521 in words is "sixteen billion, two hundred forty-nine million, four thousand, five hundred twenty-one".