97565656579 has 4 divisors (see below), whose sum is σ = 97566400384. Its totient is φ = 97564912776.

The previous prime is 97565656511. The next prime is 97565656589.

97565656579 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 97565656579 - 2¹⁷ = 97565525507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97565656589) 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, 116832 + ... + 456925.

It is an arithmetic number, because the mean of its divisors is an integer number (24391600096).

Almost surely, 2^97565656579 is an apocalyptic number.

97565656579 is a deficient number, since it is larger than the sum of its proper divisors (743805).

97565656579 is a wasteful number, since it uses less digits than its factorization.

97565656579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743804.

The product of its digits is 535815000, while the sum is 70.

The spelling of 97565656579 in words is "ninety-seven billion, five hundred sixty-five million, six hundred fifty-six thousand, five hundred seventy-nine".