90565641 has 8 divisors (see below), whose sum is σ = 134171360. Its totient is φ = 60377076.

The previous prime is 90565639. The next prime is 90565661. The reversal of 90565641 is 14656509.

90565641 is a `hidden beast` number, since 9 + 0 + 5 + 6 + 5 + 641 = 666.

It is not a de Polignac number, because 90565641 - 2¹ = 90565639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90565596 and 90565605.

It is not an unprimeable number, because it can be changed into a prime (90565621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1677115 + ... + 1677168.

It is an arithmetic number, because the mean of its divisors is an integer number (16771420).

Almost surely, 2^90565641 is an apocalyptic number.

It is an amenable number.

90565641 is a deficient number, since it is larger than the sum of its proper divisors (43605719).

90565641 is a wasteful number, since it uses less digits than its factorization.

90565641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354292 (or 3354286 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 90565641 is about 9516.5981842253. The cubic root of 90565641 is about 449.0773540137.

The spelling of 90565641 in words is "ninety million, five hundred sixty-five thousand, six hundred forty-one".