16253602549 has 2 divisors, whose sum is σ = 16253602550. Its totient is φ = 16253602548.

The previous prime is 16253602531. The next prime is 16253602619. The reversal of 16253602549 is 94520635261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11860299025 + 4393303524 = 108905^2 + 66282^2 .

It is a cyclic number.

It is not a de Polignac number, because 16253602549 - 2⁵ = 16253602517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16253602049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8126801274 + 8126801275.

It is an arithmetic number, because the mean of its divisors is an integer number (8126801275).

Almost surely, 2^16253602549 is an apocalyptic number.

It is an amenable number.

16253602549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16253602549 is an equidigital number, since it uses as much as digits as its factorization.

16253602549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 16253602549 in words is "sixteen billion, two hundred fifty-three million, six hundred two thousand, five hundred forty-nine".