16438055537 has 2 divisors, whose sum is σ = 16438055538. Its totient is φ = 16438055536.

The previous prime is 16438055521. The next prime is 16438055653. The reversal of 16438055537 is 73555083461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13629161536 + 2808894001 = 116744^2 + 52999^2 .

It is a cyclic number.

It is not a de Polignac number, because 16438055537 - 2⁴ = 16438055521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16438055491 and 16438055500.

It is not a weakly prime, because it can be changed into another prime (16438055507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8219027768 + 8219027769.

It is an arithmetic number, because the mean of its divisors is an integer number (8219027769).

Almost surely, 2^16438055537 is an apocalyptic number.

It is an amenable number.

16438055537 is a deficient number, since it is larger than the sum of its proper divisors (1).

16438055537 is an equidigital number, since it uses as much as digits as its factorization.

16438055537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 16438055537 in words is "sixteen billion, four hundred thirty-eight million, fifty-five thousand, five hundred thirty-seven".