89581265408644 has 9 divisors (see below), whose sum is σ = 156767247591717. Its totient is φ = 44790623239584.

The previous prime is 89581265408627. The next prime is 89581265408647. The reversal of 89581265408644 is 44680456218598.

The square root of 89581265408644 is 9464738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 37672122368644 + 51909143040000 = 6137762^2 + 7204800^2 .

It is a super-2 number, since 2×89581265408644² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89581265408647) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16563292 + ... + 21295660.

Almost surely, 2^{89581265408644} is an apocalyptic number.

89581265408644 is the 9464738-th square number.

It is an amenable number.

89581265408644 is a deficient number, since it is larger than the sum of its proper divisors (67185982183073).

89581265408644 is an frugal number, since it uses more digits than its factorization.

89581265408644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9464742 (or 4732371 counting only the distinct ones).

The product of its (nonzero) digits is 530841600, while the sum is 70.

The spelling of 89581265408644 in words is "eighty-nine trillion, five hundred eighty-one billion, two hundred sixty-five million, four hundred eight thousand, six hundred forty-four".