16525585469 has 2 divisors, whose sum is σ = 16525585470. Its totient is φ = 16525585468.

The previous prime is 16525585423. The next prime is 16525585481. The reversal of 16525585469 is 96458552561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14175759844 + 2349825625 = 119062^2 + 48475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16525585469 is a prime.

It is a super-2 number, since 2×16525585469² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16527585469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8262792734 + 8262792735.

It is an arithmetic number, because the mean of its divisors is an integer number (8262792735).

Almost surely, 2^16525585469 is an apocalyptic number.

It is an amenable number.

16525585469 is a deficient number, since it is larger than the sum of its proper divisors (1).

16525585469 is an equidigital number, since it uses as much as digits as its factorization.

16525585469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960000, while the sum is 56.

The spelling of 16525585469 in words is "sixteen billion, five hundred twenty-five million, five hundred eighty-five thousand, four hundred sixty-nine".