97509906845 has 16 divisors (see below), whose sum is σ = 126858538800. Its totient is φ = 71524038144.

The previous prime is 97509906833. The next prime is 97509906889. The reversal of 97509906845 is 54860990579.

It can be written as a sum of positive squares in 8 ways, for example, as 20637908281 + 76871998564 = 143659^2 + 277258^2 .

It is not a de Polignac number, because 97509906845 - 2⁸ = 97509906589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5024384 + ... + 5043753.

It is an arithmetic number, because the mean of its divisors is an integer number (7928658675).

Almost surely, 2^97509906845 is an apocalyptic number.

It is an amenable number.

97509906845 is a deficient number, since it is larger than the sum of its proper divisors (29348631955).

97509906845 is a wasteful number, since it uses less digits than its factorization.

97509906845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10068304.

The product of its (nonzero) digits is 24494400, while the sum is 62.

The spelling of 97509906845 in words is "ninety-seven billion, five hundred nine million, nine hundred six thousand, eight hundred forty-five".