89510702581 has 2 divisors, whose sum is σ = 89510702582. Its totient is φ = 89510702580.

The previous prime is 89510702557. The next prime is 89510702693. The reversal of 89510702581 is 18520701598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79096500081 + 10414202500 = 281241^2 + 102050^2 .

It is a cyclic number.

It is not a de Polignac number, because 89510702581 - 2⁹ = 89510702069 is a prime.

It is a super-2 number, since 2×89510702581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89510709581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44755351290 + 44755351291.

It is an arithmetic number, because the mean of its divisors is an integer number (44755351291).

Almost surely, 2^89510702581 is an apocalyptic number.

It is an amenable number.

89510702581 is a deficient number, since it is larger than the sum of its proper divisors (1).

89510702581 is an equidigital number, since it uses as much as digits as its factorization.

89510702581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 46.

The spelling of 89510702581 in words is "eighty-nine billion, five hundred ten million, seven hundred two thousand, five hundred eighty-one".