9697181845 has 16 divisors (see below), whose sum is σ = 12536818560. Its totient is φ = 7158095424.

The previous prime is 9697181821. The next prime is 9697181903. The reversal of 9697181845 is 5481817969.

It is a cyclic number.

It is not a de Polignac number, because 9697181845 - 2¹³ = 9697173653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9697181845.

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, 138712 + ... + 196558.

It is an arithmetic number, because the mean of its divisors is an integer number (783551160).

Almost surely, 2^9697181845 is an apocalyptic number.

It is an amenable number.

9697181845 is a deficient number, since it is larger than the sum of its proper divisors (2839636715).

9697181845 is a wasteful number, since it uses less digits than its factorization.

9697181845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60444.

The product of its digits is 4354560, while the sum is 58.

The square root of 9697181845 is about 98474.2699642907. The cubic root of 9697181845 is about 2132.4646794835.

The spelling of 9697181845 in words is "nine billion, six hundred ninety-seven million, one hundred eighty-one thousand, eight hundred forty-five".