89381266577 has 2 divisors, whose sum is σ = 89381266578. Its totient is φ = 89381266576.

The previous prime is 89381266573. The next prime is 89381266631. The reversal of 89381266577 is 77566218398.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69103791376 + 20277475201 = 262876^2 + 142399^2 .

It is a cyclic number.

It is not a de Polignac number, because 89381266577 - 2² = 89381266573 is a prime.

It is not a weakly prime, because it can be changed into another prime (89381266573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44690633288 + 44690633289.

It is an arithmetic number, because the mean of its divisors is an integer number (44690633289).

Almost surely, 2^89381266577 is an apocalyptic number.

It is an amenable number.

89381266577 is a deficient number, since it is larger than the sum of its proper divisors (1).

89381266577 is an equidigital number, since it uses as much as digits as its factorization.

89381266577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 62.

The spelling of 89381266577 in words is "eighty-nine billion, three hundred eighty-one million, two hundred sixty-six thousand, five hundred seventy-seven".