16204137202549 has 2 divisors, whose sum is σ = 16204137202550. Its totient is φ = 16204137202548.

The previous prime is 16204137202541. The next prime is 16204137202609. The reversal of 16204137202549 is 94520273140261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14897361284100 + 1306775918449 = 3859710^2 + 1143143^2 .

It is a cyclic number.

It is not a de Polignac number, because 16204137202549 - 2³ = 16204137202541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16204137202499 and 16204137202508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16204137202541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102068601274 + 8102068601275.

It is an arithmetic number, because the mean of its divisors is an integer number (8102068601275).

Almost surely, 2^{16204137202549} is an apocalyptic number.

It is an amenable number.

16204137202549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16204137202549 is an equidigital number, since it uses as much as digits as its factorization.

16204137202549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 16204137202549 in words is "sixteen trillion, two hundred four billion, one hundred thirty-seven million, two hundred two thousand, five hundred forty-nine".