89765760649 has 4 divisors (see below), whose sum is σ = 90261704260. Its totient is φ = 89269817040.

The previous prime is 89765760619. The next prime is 89765760659. The reversal of 89765760649 is 94606756798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94606756798 = 2 ⋅47303378399.

It can be written as a sum of positive squares in 2 ways, for example, as 1180953225 + 88584807424 = 34365^2 + 297632^2 .

It is a cyclic number.

It is not a de Polignac number, because 89765760649 - 2⁹ = 89765760137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89765760619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247971534 + ... + 247971895.

It is an arithmetic number, because the mean of its divisors is an integer number (22565426065).

Almost surely, 2^89765760649 is an apocalyptic number.

It is an amenable number.

89765760649 is a deficient number, since it is larger than the sum of its proper divisors (495943611).

89765760649 is a wasteful number, since it uses less digits than its factorization.

89765760649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495943610.

The product of its (nonzero) digits is 137168640, while the sum is 67.

The spelling of 89765760649 in words is "eighty-nine billion, seven hundred sixty-five million, seven hundred sixty thousand, six hundred forty-nine".