98547815609 has 2 divisors, whose sum is σ = 98547815610. Its totient is φ = 98547815608.

The previous prime is 98547815599. The next prime is 98547815659. The reversal of 98547815609 is 90651874589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54395299984 + 44152515625 = 233228^2 + 210125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98547815609 is a prime.

It is a super-2 number, since 2×98547815609² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (98547815659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49273907804 + 49273907805.

It is an arithmetic number, because the mean of its divisors is an integer number (49273907805).

Almost surely, 2^98547815609 is an apocalyptic number.

It is an amenable number.

98547815609 is a deficient number, since it is larger than the sum of its proper divisors (1).

98547815609 is an equidigital number, since it uses as much as digits as its factorization.

98547815609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21772800, while the sum is 62.

The spelling of 98547815609 in words is "ninety-eight billion, five hundred forty-seven million, eight hundred fifteen thousand, six hundred nine".