16999081537 has 2 divisors, whose sum is σ = 16999081538. Its totient is φ = 16999081536.

The previous prime is 16999081531. The next prime is 16999081553. The reversal of 16999081537 is 73518099961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12651525441 + 4347556096 = 112479^2 + 65936^2 .

It is an emirp because it is prime and its reverse (73518099961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16999081537 - 2³ = 16999081529 is a prime.

It is not a weakly prime, because it can be changed into another prime (16999081531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8499540768 + 8499540769.

It is an arithmetic number, because the mean of its divisors is an integer number (8499540769).

Almost surely, 2^16999081537 is an apocalyptic number.

It is an amenable number.

16999081537 is a deficient number, since it is larger than the sum of its proper divisors (1).

16999081537 is an equidigital number, since it uses as much as digits as its factorization.

16999081537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 16999081537 in words is "sixteen billion, nine hundred ninety-nine million, eighty-one thousand, five hundred thirty-seven".