97716440449 has 4 divisors (see below), whose sum is σ = 100357425364. Its totient is φ = 95075455536.

The previous prime is 97716440443. The next prime is 97716440461. The reversal of 97716440449 is 94404461779.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89899228224 + 7817212225 = 299832^2 + 88415^2 .

It is a cyclic number.

It is not a de Polignac number, because 97716440449 - 2¹⁹ = 97715916161 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 97716440449.

It is not an unprimeable number, because it can be changed into a prime (97716440443) 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, 1320492402 + ... + 1320492475.

It is an arithmetic number, because the mean of its divisors is an integer number (25089356341).

Almost surely, 2^97716440449 is an apocalyptic number.

It is an amenable number.

97716440449 is a deficient number, since it is larger than the sum of its proper divisors (2640984915).

97716440449 is a wasteful number, since it uses less digits than its factorization.

97716440449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640984914.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 97716440449 in words is "ninety-seven billion, seven hundred sixteen million, four hundred forty thousand, four hundred forty-nine".