90217449369 has 12 divisors (see below), whose sum is σ = 130883153700. Its totient is φ = 59882323104.

The previous prime is 90217449367. The next prime is 90217449419. The reversal of 90217449369 is 96394471209.

90217449369 is a `hidden beast` number, since 9 + 0 + 21 + 74 + 493 + 69 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77172840000 + 13044609369 = 277800^2 + 114213^2 .

It is not a de Polignac number, because 90217449369 - 2¹ = 90217449367 is a prime.

It is a super-2 number, since 2×90217449369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90217449367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21884754 + ... + 21888875.

It is an arithmetic number, because the mean of its divisors is an integer number (10906929475).

Almost surely, 2^90217449369 is an apocalyptic number.

It is an amenable number.

90217449369 is a deficient number, since it is larger than the sum of its proper divisors (40665704331).

90217449369 is a wasteful number, since it uses less digits than its factorization.

90217449369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43773864 (or 43773861 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 90217449369 in words is "ninety billion, two hundred seventeen million, four hundred forty-nine thousand, three hundred sixty-nine".