16528439897 has 2 divisors, whose sum is σ = 16528439898. Its totient is φ = 16528439896.

The previous prime is 16528439861. The next prime is 16528439927. The reversal of 16528439897 is 79893482561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15391131721 + 1137308176 = 124061^2 + 33724^2 .

It is a cyclic number.

It is not a de Polignac number, because 16528439897 - 2⁶ = 16528439833 is a prime.

It is not a weakly prime, because it can be changed into another prime (16528438897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8264219948 + 8264219949.

It is an arithmetic number, because the mean of its divisors is an integer number (8264219949).

Almost surely, 2^16528439897 is an apocalyptic number.

It is an amenable number.

16528439897 is a deficient number, since it is larger than the sum of its proper divisors (1).

16528439897 is an equidigital number, since it uses as much as digits as its factorization.

16528439897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 62.

The spelling of 16528439897 in words is "sixteen billion, five hundred twenty-eight million, four hundred thirty-nine thousand, eight hundred ninety-seven".