97216661279 has 4 divisors (see below), whose sum is σ = 97370729520. Its totient is φ = 97062593040.

The previous prime is 97216661273. The next prime is 97216661317.

97216661279 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97216661279 - 2⁴ = 97216661263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97216661273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77033174 + ... + 77034435.

It is an arithmetic number, because the mean of its divisors is an integer number (24342682380).

Almost surely, 2^97216661279 is an apocalyptic number.

97216661279 is a deficient number, since it is larger than the sum of its proper divisors (154068241).

97216661279 is a wasteful number, since it uses less digits than its factorization.

97216661279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154068240.

The product of its digits is 3429216, while the sum is 56.

The spelling of 97216661279 in words is "ninety-seven billion, two hundred sixteen million, six hundred sixty-one thousand, two hundred seventy-nine".