97945819599 has 4 divisors (see below), whose sum is σ = 130594426136. Its totient is φ = 65297213064.

The previous prime is 97945819597. The next prime is 97945819627. The reversal of 97945819599 is 99591854979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99591854979 = 3 ⋅33197284993.

It is not a de Polignac number, because 97945819599 - 2¹ = 97945819597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97945819599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97945819591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16324303264 + ... + 16324303269.

It is an arithmetic number, because the mean of its divisors is an integer number (32648606534).

Almost surely, 2^97945819599 is an apocalyptic number.

97945819599 is a deficient number, since it is larger than the sum of its proper divisors (32648606537).

97945819599 is a wasteful number, since it uses less digits than its factorization.

97945819599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32648606536.

The product of its digits is 330674400, while the sum is 75.

The spelling of 97945819599 in words is "ninety-seven billion, nine hundred forty-five million, eight hundred nineteen thousand, five hundred ninety-nine".